Maricopa County, Arizona, has become the nation’s ultimate swing county, a place that could determine whether Democrat Kamala Harris or Republican Donald Trump will be the next U.S. president.

Voters in Arizona have no shortage of competitive races to decide in the Nov. 5 general election, with control of the White House, the U.S. Senate and House and both chambers of the state Legislature in the balance.

Kari Lake has won the Republican nomination for U.S. Senate in Arizona, setting up a fierce battle against Democratic U.S. Rep. Ruben Gallego for a seat that could be crucial to deciding Senate control.

Arizona is already expected to play a critical role in the race for the White House as it did in 2020.

A stunning abortion ruling this week has supercharged Arizona’s role in the looming fall election.

Democratic congressman Ruben Gallego has started airing the first television ads of his Arizona U.S. Senate campaign.

Independent Sen. Kyrsten Sinema of Arizona says she won’t run for a second term this year.

Maine's vaunted independent voters are becoming scarcer as Super Tuesday approaches.

A former youth minister in the Baptist church, Oklahoma Sen. James Lankford is known as one of the most sincere and well-liked members of the Senate.

A provision of border security legislation that would give the U.S. a new authority to block migrants from entering the country has become a central line of attack from many Republicans who are opposing the legislation.

Senate negotiators have reached a deal on a proposal to overhaul the asylum system at the U.S. border with Mexico.

Senate leaders are attempting to push forward a deal to pair new policies at the southern border with wartime aid for Ukraine and other American allies, but they will have to overcome heavy skepticism from Republicans.

U.S. House Speaker Mike Johnson has led about 60 fellow Republicans in Congress on a visit to the Mexican border.

Phoenix Mayor Kate Gallego has endorsed her ex-husband, U.S. Rep. Ruben Gallego, in his campaign to move up to the Senate.

Congress return to work this week after the holiday break, and Senate Republicans have made clear they won’t support additional war aid for Ukraine unless they can pair it with border security measures.

Kari Lake launched a U.S. Senate campaign with a splashy rally outside Phoenix, having never conceded she lost last year’s race for Arizona governor.

Donald Trump ally Kari Lake, who's refused to acknowledge her loss in last year’s race for Arizona governor, is now running for U.S. Senate.

Billie Jean King’s victory in the “Battle of the Sexes” was a milestone moment as women pushed for equality on the playing field and beyond.

Arizona Sen. Kyrsten Sinema is taking credit for helping broker legislation that would target executives of failed banks.

The White House is hoping that Julie Su’s role in brokering a deal between West Coast dockworkers and shippers will provide fresh momentum for the Senate to act on her long-stalled nomination to be labor secretary.

A Republican measure overturning President Joe Biden’s student loan cancellation plan has passed the Senate and now awaits an expected veto.

Businessperson Karrin Taylor Robson says she won't run for the Arizona Senate seat now held by independent Kyrsten Sinema.

A judge has rejected Kari Lake’s remaining legal claim challenging her loss in the race for Arizona governor.

President Joe Biden’s nomination for the next labor secretary, Julie Su, has advanced through a Senate committee.

Arizona Sen. Kyrsten Sinema reported raising just over $2 million in her first full fundraising quarter since leaving the Democratic Party.

Sheriff Mark Lamb says he's running for the U.S. Senate in Arizona.

Congress on Wednesday approved a resolution to overturn the Biden administration's protections for thousands of small streams, wetlands and other waterways.

The fate of President Joe Biden's pick to run the Federal Aviation Administration is in doubt.

Democratic Rep. Ruben Gallego is slamming independent Sen. Kyrsten Sinema for backing a bank deregulation bill he says contributed to the collapse of Silicon Valley Bank.

A group that has pledged to create a pathway for an alternative candidate to run against the Republican and Democratic presidential nominees in 2024 will get a spot on the ballot in Arizona.

Democratic unity in Arizona helped the party pick up two U.S. Senate seats and the top three state offices over the last few years.

Democrat Ruben Gallego has held the first public events of his U.S. Senate campaign, taking aim at independent incumbent Kyrsten Sinema and casting his candidacy in a patriotic appeal to the American dream.

Former Nebraska Gov. Pete Ricketts was sworn into the U.S. Senate on Monday, replacing Republican Sen. Ben Sasse as the Senate returns from several weeks of recess and begins a new session of closely-divided government.

Democratic U.S. Rep. Ruben Gallego says he’ll challenge independent U.S. Sen. Kyrsten Sinema of Arizona in 2024.

President Joe Biden has made a historical pilgrimage to what he calls “America’s freedom church” to mark Martin Luther King Jr.’s birthday.

Lawmakers who eagerly accepted piles of cash from Samuel Bankman-Fried now can’t move fast enough to offload contributions from the disgraced crypto mogul to anywhere but their own campaign coffers.

The challenges facing the Democratic Party heading into the next campaign have come into sharp relief just a few days after the party celebrated victory in the final Senate contest of the 2022 midterms.

Arizona Sen. Kyrsten Sinema is becoming an Independent and leaving the Democratic Party.

Democratic Sen. Kyrsten Sinema of Arizona says she has switched her registration to independent.

Passing legislation to protect same-sex marriages in the Senate was a monthslong effort, building on a decadeslong push.

The House has given final approval to protections for same-sex marriages.

Legislation that ensures same-sex and interracial marriages are recognized as legal unions appears headed for final approval and President Joe Biden’s signature.

Democrats celebrating a successful effort to keep control of the U.S. Senate this year will soon confront a 2024 campaign that could prove more challenging.

Democrats have secured their majority in the Senate for the next two years.

The turnout machine that left-leaning Latino activists have built since Arizona enacted a tough crackdown on immigrants will be put to the test in Tuesday's election.

The Libertarian candidate for U.S. Senate from Arizona, Marc Victor, dropped out of the race Tuesday and urged his supporters to vote for Republican Blake Masters.

President Joe Biden is promising that the first bill he sends to Capitol Hill next year will be one that codifies Roe v. Wade — if Democrats control enough seats in Congress for Biden to sign abortion protections into law.

A year ago, Arizona’s Democratic Secretary of State Katie Hobbs was all over cable news, building a national profile as a defender of democracy and raking in cash for her campaign for governor.

Sen. Kyrsten Sinema says Americans prefer politicians who work across the aisle.

The consequences of drought and efforts to funnel billions of dollars toward securing water supplies in the West are becoming larger issues in two of the most consequential races for the U.S. Senate.

Democrats are punting a vote to protect same-sex and interracial marriages until after the November midterm elections, a blow for the legislation that comes days after Senate Majority Leader Chuck Schumer vowed to put the Senate on the record on the issue “in the coming weeks.”.

Russia has imposed sanctions on 25 Americans, including actors Sean Penn and Ben Stiller.

President Joe Biden arrived at the White House promising to “build back” America, and now he has signed into law legislation with a slimmer version of that idea.

Seven Western U.S. states face a deadline from the federal government to come up with a plan to use substantially less Colorado River water in 2023.

Democratic Sen. Kyrsten Sinema of Arizona has received nearly $1 million in campaign contributions over the past year from private equity professionals, hedge fund managers and venture capitalists whose interests she has staunchly defended in Congress.

The biggest investment ever in the U.S. to fight climate change.

Democrats have pushed their landmark climate and health care bill through Congress, handing an election-year victory to President Joe Biden.

The estimated $740 billion economic package from Democrats is nowhere near what President Joe Biden first envisioned with his effort to rebuild America’s public infrastructure and family support systems.

Over five decades in Washington, Joe Biden knew that the way to influence was to be in the room where it happens.

The Senate has approved Democrats' big election-year economic package.

The estimated $740 billion economic package from Democrats is nowhere near what President Joe Biden first envisioned with his effort to rebuild America’s public infrastructure and family support systems.

Sen. Joe Manchin sealed the deal reviving President Joe Biden’s big economic, health care and climate bill.

Senate Majority Leader Chuck Schumer says Democrats have made changes in their giant economic bill that include paring part of their proposed minimum tax on huge corporations.

Senate Democrats say they have reached an accord on changes to their marquee economic legislation, clearing the major hurdle to pushing one of President Joe Biden’s leading election-year priorities through the chamber in coming days.

Democrats call it the “Inflation Reduction Act.”.

Republicans see inflation, taxes and immigration as Democratic weak spots worth attacking in the upcoming battle over an economic package the Democrats want to push through the Senate.

A bipartisan group of senators is pushing compromise legislation to restore abortion access in the wake of the June Supreme Court decision to overturn Roe v. Wade.

Democratic Sen. Kyrsten Sinema's views remained a mystery as party leaders eye votes later this week on their emerging economic legislation.

Democratic Sen. Joe Manchin is declining to endorse Joe Biden if the president seeks a second term in 2024 and is refusing to say whether he wants Democrats to retain control of Congress after the November elections.

In a story published July 30, 2022, The Associated Press reported that the Congressional Budget Office estimated that an insulin bill would increase the price of the drug.

An unexpected deal reached by Senate Democrats would be the most ambitious action ever taken by the United States to address global warming and could help President Joe Biden come close to meeting his pledge to cut greenhouse gas emissions in half by 2030.

Some older Americans are cheering news of a deal on Capitol Hill that could lead to lower drug costs.

President Joe Biden is hailing a nascent Democratic package of climate, health care and tax initiatives as a giant step forward for the country.

It was launched as the new president’s ambitious plan for rebuilding America.

President Joe Biden says he would support an exception to the Senate filibuster to protect access to abortion after the U.S. Supreme Court overturned Roe versus Wade.

The House has sent President Joe Biden the most wide-ranging gun violence bill Congress has passed in decades.

The Senate has approved a bipartisan gun violence bill.

Last month's mass shootings in Buffalo, New York, and Uvalde, Texas, have produced a groundswell for change in Congress.

Democratic and Republican senators are at odds over how to keep firearms from dangerous people.

Many of the nation’s most vulnerable Democrats are actively trying to distance themselves from Washington — and their party — as the midterm season enters its next phase.

After wrapping up the Summit of the Americas in Los Angeles, President Joe Biden turned his attention from foreign policy to politics.

Less than 48 hours after a gunman stormed an elementary school and killed 19 children and two teachers in his home state of Texas, Sen. John Cornyn was tapped to lead gun policy negotiations in the Senate.

After two years at the front of the line for COVID-19 vaccines and treatments, the U.S. could soon have to begin taking a number.

Republican Senators Lisa Murkowski and Mitt Romney say they will vote to confirm Judge Ketanji Brown Jackson’s historic nomination to the Supreme Court, giving President Joe Biden’s nominee a new burst of bipartisan support to become the first Black woman on the high court.

The Biden administration’s decision to end sweeping asylum limits at the border this May satisfied demands by prominent Democrats.

Republican Sen. Lindsey Graham says he won’t vote for Supreme Court nominee Ketanji Brown Jackson.

Maine Sen. Susan Collins says she'll vote to confirm Judge Ketanji Brown Jackson, giving Democrats at least one Republican vote and all but assuring Jackson will become the first Black woman on the Supreme Court.

President Joe Biden’s $5.8 trillion budget for next year would trim federal deficits and boost taxes on the wealthiest Americans.

The “Billionaire Minimum Income Tax” included in President Joe Biden's proposed budget is part of the administration’s effort to reduce the federal deficit.

Arizona has long been fertile ground for a social conservative agenda, with some of the nation’s toughest laws against abortion and a history of restricting LGBTQ rights.

Democratic Sen. Joe Manchin has announced his intention to support the nomination of Ketanji Brown Jackson to serve on the U.S. Supreme Court, pushing her one step closer to confirmation.

Addressing a concerned nation and anxious world, President Joe Biden has vowed in his first State of the Union address to check Russian aggression in Ukraine, tame soaring U.S. inflation and deal with the fading but still dangerous coronavirus.

President Joe Biden and Senate Democrats say they are hoping for a bipartisan vote to confirm Ketanji Brown Jackson to the Supreme Court.

Rents have exploded across the country, causing many to fall behind on payments, dig deep into their savings or downsize to subpar units.

Democrats have conflicting views of what they're accomplishing in the 50-50 Senate and of how to take advantage of their control on the chamber.

President Joe Biden is trying to jump-start progress on his stalled domestic agenda by refocusing attention on one of his most popular proposals, limiting the cost of prescription drugs.

More than 600 sitting senators have died or resigned since the first Congress met in 1789.

The Democrats’ fragile hold on the Senate majority has become vividly apparent with the sudden illness of of New Mexico Sen. Ben Ray Luján.

A trial challenging Florida’s new voting restrictions has begun with civil rights groups moving to block the sweeping Republican election law as an unnecessary burden on the right to cast ballots.

Democrats have fractured repeatedly over President Joe Biden’s agenda, stalling legislation and creating an atmosphere of mistrust that threatens the party’s political prospects in November.