Senate Majority Leader John Thune is rushing to meet President Donald Trump’s July 4 deadline for pushing through his massive tax and spending bill, but first he has to work through a list of approximately eight Republican senators who have expressed opposition to portions of it.

Within the next two days, he needs to find a way to appease most of them.

The South Dakota Republican has one of the least enviable jobs in Washington in the coming hours — trying to knit a compromise between factions of his party: one side pushing for more spending cuts in the legislation and senators who are threatening to withhold their support unless there is more funding for health benefits, renewable energy subsidies and other priorities.

Thune can afford to lose only three of his 53 members in the chamber, with Vice President JD Vance breaking the tie.

Trump is closely watching the talks, quick to issue a harsh social media broadside to anyone who criticize his signature tax-cut legislation.

Just ask North Carolina Senator Thom Tillis, one of two Republicans who voted against a late-night Saturday procedural vote to begin debate on the legislation.

Trump unleashed a series of scathing posts, threatening to primary Tillis. The president took personal swipes, calling him a “talker and complainer, NOT A DOER!” before also getting in a jab at Rand Paul, the other GOP senator to oppose the vote to advance the bill.

Tillis on Sunday announced he wouldn’t be running for reelection, a decision that unshackles him from any need to show fidelity to Trump to preserve his political career. He’s indicated he’s likely to oppose the bill.

Paul has said he is also likely to vote “no” on the legislation based on the price tag and the inclusion of a $5 trillion debt ceiling increase. If both Tillis and Paul remain in opposition, Thune can only lose one more.

Polls show that Americans are wary of the bill. A recent Pew Research survey found that 49% of Americans oppose the bill, while 29% supported it. Some 21% weren’t sure what to think.

Republicans in Congress broadly support the $4.5 trillion worth of tax cuts in the package, which extend the 2017 tax cuts and create new breaks for tipped and hourly workers, along with seniors and car buyers. But the $1.2 trillion worth of spending cuts have created numerous problems.

Moderates including Tillis, Susan Collins of Maine and Lisa Murkowski of Alaska are pushing to scale back cuts to Medicaid benefits, warning that those reductions could come at a great political cost if millions of Americans lose health coverage as a result of the bill.

Some 11.8 million people could lose access to insurance benefits over the course of a decade, according to the Congressional Budget Office’s most recent estimate.

Murkowski and Tillis have also called to slow down planned phaseouts of solar, wind and other renewable energy credits that have spurred job creation in their states.

Those asks are in direct opposition to demands from Senator Ron Johnson of Wisconsin and others to bake in more Medicaid cuts in a bid to shrink the overall price tag of the bill. He says Rick Scott of Florida, Mike Lee of Utah and Cynthia Lummis of Wyoming will join with him to back an amendment to include faster health coverage cuts during an a marathon voting session slated to start late Sunday or early Monday.

Trump has not delved into the details of the legislation. Instead, the president has pushed for speed, demanding that Congress deliver the bill to him by July 4. The House will also need to vote on the Senate-passed version before it can go to the president’s desk to be signed into law.

Meeting the July 4 deadline is ambitious — but possible if Republican leaders can successfully navigate thorny fights. Senators are expected to remain in the Capitol Sunday into Monday for an overnight voting session. Final passage of the bill could come sometime Monday if Thune is able to cut deals with enough senators for passage.

The House then will need to vote on the Senate package. That likely means Speaker Mike Johnson will have to wrangle House Republicans to support the Senate package.

Several members have already signaled they aren’t satisfied with aspects of the bill, but any further changes likely mean missing Trump’s July 4 deadline and risking his ire.

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