WASHINGTON 鈥 Senators hunkered down Monday to consider proposed amendments to President Donald Trump's bill of tax breaks and spending cuts amid challenges including the weekend announcement from one GOP senator that he won't run for reelection after opposing the package over its Medicaid health care cuts.

The Capitol is seen is seen Sunday as Senate Republicans work to pass President Donald Trump's bill of tax breaks and spending cuts.
The grind was expected to take all day and could churn into the night. Potential changes were being considered in what鈥檚 called a vote-a-rama, though most are expected to fail. Democrats were united against the Republican president's legislation and eagerly lined up to challenge it.

Senate Majority Leader John Thune, R-S.D., walks to the chamber as Senate Republicans work to pass President Donald Trump's bill of tax breaks and spending cuts Sunday at the Capitol.
鈥淚t's time to vote,鈥 said Senate Majority Leader John Thune of South Dakota, as the chamber opened. But later he suggested final action could slip.
Senate Democratic Leader Chuck Schumer of New York said the 鈥渉ardest choices" for Republicans are still to come. Democrats, he said, are bringing 鈥渁mendment after amendment after amendment to the floor, so Republicans can defend their billionaire tax cuts and so they can try to explain their massive cuts to Medicaid to people back home.鈥
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The day will be pivotal for the Republicans, who have control of Congress and are racing against Trump's July 4 deadline to wrap up work. The 940-page 鈥淥ne Big Beautiful Bill Act,鈥 as it's formally titled, has consumed Congress as its shared priority with the president, with no room politically to fail, even as not all Republicans are on board.
House Speaker Mike Johnson of Louisiana was calling lawmakers back Wednesday for final votes, if it clears the Senate.
A new analysis from the nonpartisan Congressional Budget Office found 11.8 million more Americans would become uninsured by 2034 if the bill became law. The CBO said the package would increase the deficit by nearly $3.3 trillion over the decade.
The White House said it was counting on Republican lawmakers to "get the job done.鈥
鈥淩epublicans need to stay tough and unified during the home stretch,鈥 White House press secretary Karoline Leavitt said.
But the outcome remained uncertain.
As the first few Senate amendments came up Monday 鈥 to strike parts of the bill that would limit Medicaid funds to rural hospitals or shift the costs of food stamps benefits to the states 鈥 some were winning support from a few Republicans.

Sen. Lisa Murkowski, R-Alaska, center, a member of the Senate Appropriations Committee, arrives for a closed-door Republican meeting to advance President Donald Trump's sweeping domestic policy bill Friday at the Capitol.
Sen. Susan Collins, R-Maine, joined Democrats on the rural hospitals amendment, and Sen. Lisa Murkowski, R-Alaska, joined Democrats on both votes.
But none of the amendments won majority support to substantially change the package.
Few Republicans appeared fully satisfied as the final package emerged. GOP Sen. Thom Tillis of North Carolina, who announced Sunday he would not seek reelection after Trump badgered him over his opposition to the package, said he has the same goals as Trump: cutting taxes and spending.

Sen. Thom Tillis, R-N.C., speaks with reporters as he heads to the chamber during a test vote to begin debate on a border security bill Feb. 7 at the Capitol.
But Tillis said this package is a betrayal of the president's promises not to kick people off health care, especially if rural hospitals close.
At the same time, some loosely aligned conservative Senate Republicans 鈥 Rick Scott of Florida, Mike Lee of Utah, Ron Johnson of Wisconsin and Cynthia Lummis of Wyoming 鈥 have proposed steeper cuts, particularly to health care, drawing their own warning from Trump not to go 鈥渃razy."
Sen. Mike Crapo, the GOP chairman of the Finance Committee dismissed the dire predictions of health care cuts as Democrats trafficking in what he called the 鈥減olitics of fear.鈥
All told, the Senate bill includes $4.5 trillion in tax cuts, according to the latest CBO analysis, making permanent Trump's 2017 rates, which would expire at the end of the year if Congress failed to act, while adding the new ones he campaigned on, including no taxes on tips.
President Donald Trump鈥檚 $3.3 trillion tax and spending bill has hit turbulence in the U.S. Senate. Senate Majority Leader John Thune is racin…
The Senate package would roll back billions of dollars in green energy tax credits that Democrats warn will wipe out wind and solar investments nationwide and impose $1.2 trillion in cuts, largely to Medicaid and food stamps, by imposing work requirements, making sign-up eligibility more stringent and changing federal reimbursements to states.
Additionally, the bill would provide a $350 billion infusion for border and national security, including for deportations, some of it paid for with new fees charged to immigrants.
Unable to stop the march toward passage, the Democrats as the minority party in Congress are using the tools at their disposal to drag out the process.
Democrats forced a full reading of the text, which took 16 hours, and now are filing dozens of amendments.

Senate Minority Leader Chuck Schumer, D-N.Y., talks with reporters as Senate Republicans work to advance President Donald Trump's sweeping domestic policy bill Friday at the Capitol.
Sen. Patty Murray of Washington, the ranking Democrat on the Appropriations Committee, raised particular concern about the accounting method being used by the Republicans, which says the tax breaks from Trump's first term are now 鈥渃urrent policy鈥 and the cost of extending them should not be counted toward deficits.
鈥淚n my 33 years here in the United States Senate, things have never 鈥 never 鈥 worked this way,鈥 said Murray, the longest-serving Democrat on the Budget Committee.
She said that kind of 鈥渕agic math鈥 won't fly with Americans trying to balance their own household books.
鈥淕o back home,鈥 she said, 鈥渁nd try that game with your constituents.鈥
Scenes from President Donald Trump's visit to the Middle East

Qatar's Emir Sheikh Tamim bin Hamad Al Thani welcomes President Donald Trump during an official welcoming ceremony at the Amiri Diwan in Doha, Qatar, Wednesday, May 14, 2025. (AP Photo/Alex Brandon)

Commerce Secretary Howard Lutnick takes a selfie with Qatari officials while President Donald Trump and Qatar's Emir Sheikh Tamim bin Hamad Al Thani meet at the Amiri Diwan in Doha, Qatar, Wednesday, May 14, 2025. (AP Photo/Alex Brandon)

President Donald Trump gestures as he walks with Qatar's Emir Sheikh Tamim bin Hamad Al Thani after a signing ceremony at the Amiri Diwan in Doha, Qatar, Wednesday, May 14, 2025. (AP Photo/Alex Brandon)

Guards sit on camels outside Lusail Palace as President Donald Trump and Qatar's Emir Sheikh Tamim bin Hamad Al Thani prepare to attend a state dinner in Doha, Qatar, Wednesday, May 14, 2025. (AP Photo/Alex Brandon)

President Donald Trump speaks with Qatar's Emir Sheikh Tamim bin Hamad Al Thani prior a state dinner at the Lusail Palace, in Doha, Qatar, Wednesday, May 14, 2025. (AP Photo/Alex Brandon)

Syrians celebrate after U.S. President Donald Trump announced plans during his visit to Saudi Arabia to ease sanctions on Syria and normalize relations with its new government, in Homs, Syria, late Tuesday, May 13, 2025.(AP Photo/Omar Albam)

President Donald Trump and Qatar's Emir Sheikh Tamim bin Hamad Al Thani reviews Qatari honor guard during an official welcoming ceremony at the Amiri Diwan in Doha, Qatar, Wednesday, May 14, 2025. (AP Photo/Alex Brandon)

President Donald Trump holds up a pen given by Qatar's Emir Sheikh Tamim bin Hamad Al Thani as they exchange documents during a signing ceremony at the Amiri Diwan in Doha, Qatar, Wednesday, May 14, 2025. (AP Photo/Alex Brandon)

President Donald Trump speaks to reporters aboard Air Force One en route from Riyadh, Saudi Arabia to Doha, Qatar, Wednesday, May 14, 2025. (AP Photo/Alex Brandon)

Qatar Emiri Air Force F-15s provide an honorary escort for Air Force One, carrying President Donald Trump, as it arrives in Doha, Qatar, Wednesday, May 14, 2025. (AP Photo/Alex Brandon)

President Donald Trump arrives with Saudi Crown Prince Mohammed bin Salman for the group photo with Gulf Cooperation Council leaders during the GCC Summit in Riyadh, Saudi Arabia, Wednesday, May 14, 2025. (AP Photo/Alex Brandon)

President Donald Trump and Qatar's Emir Sheikh Tamim bin Hamad Al Thani meet at the Amiri Diwan in Doha, Qatar, Wednesday, May 14, 2025. (AP Photo/Alex Brandon)