Sen. Thom Tillis’ decision not to seek reelection is jolting what was already expected to be a fierce battle for his seat, which will now be wide open in 2026.

The president's spending bill came down to the wire with three Republican senators ultimately choosing not to support his cuts.

Trump's major tax and immigration bill now heads to the House for final approval after narrowly clearing the Senate, but it's likely to face some more issues there.

The Senate voted 50-50 on President Donald Trump's megabill. Vice President JD Vance cast the tie-breaking vote to pass the massive tax and immigration bill.

ABC News’ Rachel Scott reports on the "vote-a-rama" on proposed amendments to President Donald Trump's megabill for his second term priorities.

ABC News’ Jay O’Brien reports on the latest headlines concerning the fate of President Donald Trump's megabill.

A second Democrat has announced a campaign to unseat a GOP congressman in one of Michigan's most competitive U.S. House districts

The Senate is plowing ahead toward a final vote on President Trump's sweeping tax and immigration bill, as Republicans rush to get it across the finish line by July 4.

Sharp Medicaid cuts could result in vulnerable Americans no longer being able to receive care, either by losing coverage or by closing the centers that provide such care.

Elon Musk, the world’s richest man, on Monday said he would back challengers to members of Congress who vote for President Donald Trump's "big, beautiful bill."

The Senate on Monday morning began a marathon voting session on proposed amendments to President Donald Trump's megabill for his second term priorities.

In fiery remarks on the Senate floor on Sunday night, North Carolina Sen. Thom Tillis urged his Republican colleagues to reconsider their support for the GOP tax bill.

Carol Moseley Braun, the first black woman elected to the U.S. Senate, looks back on her historic career in her memoir, “Trailblazer.”

Senate Democratic Leader Chuck Schumer said many Republicans agree with Tillis.

ABC News’ Jay O’Brien and Rachel Scott report on where things stand with President Donald Trump’s legislative priority.

Republican U.S. Rep. Don Bacon of Nebraska has announced he will not seek reelection next year

The Senate narrowly advanced President Trump's signature legislation. ABC News' Jay O'Brien reports from Capitol Hill.

On “This Week,” ABC News Correspondent Jay O’Brien reports on the latest from Capitol Hill.

After the Senate advanced President Trump's so-called "One Big Beautiful Bill," ABC News' chief Washington correspondent Jonathan Karl breaks down the path ahead for possible passage.

New York Republican Congressman John Katko breaks down details of the "One Big Beautiful Bill Act" after it was advanced by the Senate.

Hours after defying President Trump’s spending bill, GOP Senator Thom Tillis announced that he will not seek reelection next year in North Carolina.

As Trump’s ‘Big Beautiful Bill’ moves forward, Brendan Duke, senior director for federal budget policy at the Center on Budget and Policy Priorities, breaks down who benefits and who loses out.

GOP Sen. Thom Tillis won't run again after Trump threatened to find primary challengers after the Tillis' vote against advancing Trump's megabill to a vote in the Senate.

It was a very late-night vote for the Senate, just barely getting enough votes to advance the bill. Congress is sprinting to get the so-called "Big Beautiful Bill" on Trump's desk by Fourth of July.

Elon Musk is doubling down on his distaste for President Donald Trump’s sprawling tax and spending cuts bill

Senators are working through the weekend on the so-called One Big Beautiful Bill Act, and while Democrats can't stop the bill from moving forward, they do have a new plan to slow down the process.

The Senate held a rare Saturday session to advance the president's tax cuts and spending bill.

House Speaker Mike Johnson said members of Congress are going over the final sticking points of the bill -- with the end in sight.

The Senate is working through the weekend as many Republican leaders try to pass President Trump’s so-called “One Big Beautiful Bill".

Senate Finance Committee unveils its proposed changes to the House-passed version of Trump's "big, beautiful bill," which could put the two chambers on collision course.

Senate Majority Leader John Thune can afford to lose only three Republican senators when Trump's "big, beautiful bill goes to the Senate floor.

ABC News' Rachel Scott reports on President Donald Trump's efforts to rally Republicans to push through his "big beautiful bill" ahead of his July 4 deadline.

The decision is a major setback for Republicans who are under time pressure.

The Trump administration briefed senators on the impact of the U.S strikes on Iran’s nuclear facilities. Sen. Adam Schiff, D-Calif., who just got out of the briefing, joins ABC News.

U.S. Rep. LaMonica McIver has pleaded not guilty to federal charges accusing her of assaulting and interfering with immigration officers outside a New Jersey detention center

Scott Brown, a Republican who once represented Massachusetts in the U.S. Senate, has announced his second bid for the New Hampshire Senate being vacated by Democrat Jeanne Shaheen next year

Lawmakers will be looking for answers and evidence from the administration.

Members of Congress grilled Federal Reserve Chair Jerome Powell during a House hearing on Tuesday -- where a baby made a notable appearance in a moment of levity.

President Trump tells Senate Republicans to lock themselves in a room if necessary to work out differences and pass the megabill that will fund his second-term agenda.

President Donald Trump's strike against Iran will be met with pushback on Capitol Hill this week as some lawmakers argue the military action was unconstitutional.

This week stands to be not only one of the most consequential of Trump's presidency on the international stage, but also perhaps in domestic policy as well.

Lawmakers expressed surprise after the President Trump announced the U.S. had attacked three Iranian nuclear sites.

Lawmakers expressed surprise after the President Trump announced the U.S. had attacked three Iranian nuclear sites.

Congressman Max Miller says that he was run off the road by a man waving a Palestinian flag as the incident comes amid a heightened environment of political violence.

The Social Security fund will run dry in 2033, unless Congress combines the program's old-age and disability funds, in which case insolvency would arrive in 2034, a report found.

Authorities are trying to determine who has been anonymously ordering pizzas that are sent to the homes of U.S. lawmakers across the country and to the homes of those who help protect those lawmakers.

Senate Republicans largely lined up behind President Donald Trump's handling of the conflict between Iran and Israel, and said they trust the president’s judgment.

The Senate Judiciary Committee is holding a hearing Wednesday examining the cognitive abilities of former President Joe Biden.

The Senate voted 68-30 to pass the measure late Tuesday.

Lawmakers are introducing resolutions aimed at preventing the U.S. from getting involved with Israel's military campaign against Iran.