WASHINGTON >> President Donald Trump on Tuesday ratcheted up pressure on Senate Republicans to quickly embrace and pass legislation carrying his domestic agenda, intensifying a battle inside the GOP about what should be in the measure and how much it should cost.

The divisions are threatening the fate of the bill, which includes large tax cuts; reductions to Medicaid, food assistance and clean energy programs; and additional money for border security and the military. They erupted online Tuesday after Trump lashed out at an outspoken Senate Republican opponent and as Trump ally Elon Musk denounced the bill as “a disgusting abomination.”

Targeting Rand Paul

Trump began the day lashing out on social media at Sen. Rand Paul, R-Ky., for refusing to back the bill, claiming that Paul had little understanding of the measure and adding: “His ideas are actually crazy (losers!). The people of Kentucky can’t stand him.”

“He loves voting ‘NO’ on everything, he thinks it’s good politics, but it’s not,” Trump wrote of Paul, calling the legislation a “big WINNER!”

Hours later, Musk panned the bill in his own social media posts.

His broadside served as a shot in the arm for conservatives in Congress like Paul who are agitating for deeper spending cuts in the legislation and object to the estimated price tag of the bill, which is projected to add as much as $3 trillion to the debt over the next decade.

“I agree with Elon,” Paul wrote later in his own post, while Rep. Thomas Massie of Kentucky, one of just two House Republicans who voted against the measure, chimed in with a “He’s right.”

Pressure from Trump

Trump on Monday publicly urged Senate Republicans to move swiftly on the measure, touting its provisions cutting taxes, beefing up border enforcement and deportations, rolling back clean energy programs and scaling back Medicaid and food assistance, among others.

“I call on all of my Republican friends in the Senate and House to work as fast as they can to get this Bill to MY DESK before the Fourth of JULY,” Trump wrote.

That means that competing factions of Republicans will have to patch over their divisions in short order. Senate Republicans have a slim majority, and can afford to lose only three votes on the bill.

Other opposition

But Musk’s criticism only underscored the rifts that were already threatening the bill. Other Senate Republicans have raised the opposite concern, arguing that it cuts too aggressively into certain federal programs, including Medicaid and clean energy tax credits created during the Biden administration.

The dispute is playing out as Senate Republicans begin their work on the bill, following its passage in the House over solid Democratic opposition. Even as House Speaker Mike Johnson has implored senators not to make major changes that could jeopardize the measure’s chances of final approval in the House, senators have made clear that they intend to put their own mark on the package.

“We’re anxious to have the ball and to run with it,” Sen. John Thune of South Dakota, the majority leader, said Tuesday.

“Obviously, we’re going to take a lot of input from our members and make sure that as we go through the process, it’s done in a way that incorporates the views of Republican senators,” he added.

One group, led by Paul as well as Sens. Ron Johnson of Wisconsin and Mike Lee of Utah, is agitating for deeper spending cuts, noting that the bill as written is projected to balloon federal deficits. Paul also opposes the measure’s $4 trillion increase in the debt limit, a boost that the Treasury Department says is needed to avert a federal default as early as July.

Party leaders have been working to try to tamp down their opposition. Trump spoke by phone with Paul and Ron Johnson earlier this week.

“He did most of the talking,” Paul told CNN of the president. Asked whether Trump changed his mind, the senator replied, “No.”

Another faction — including Sens. Josh Hawley of Missouri, Jim Justice of West Virginia and Susan Collins of Maine — has expressed concerns about a provision in the bill that would limit strategies that states have developed to tax medical providers and pay them higher prices for Medicaid services. The senators’ worry is that the change could adversely affect rural hospitals in their states.

“They’re very concerned about it, and rightly so,” Hawley said of the leaders of rural hospitals in Missouri. “You want to get major savings in the health care sector? Don’t take away the rural hospital improvement benefits from working people.”

Still another group, including GOP Sens. Thom Tillis of North Carolina and John Curtis of Utah, have indicated unhappiness with the legislation’s aggressive — and almost total — repeal of clean energy tax credits created by legislation passed during President Joe Biden’s administration, which he named the Inflation Reduction Act.

“I just want Republicans to be thoughtful and not reactive. Just because it was in the IRA,” Curtis told reporters, referring to the law by its abbreviation, “doesn’t make it bad.”

Sen. Lisa Murkowski, R-Alaska, also has raised concerns about both the Medicaid cuts and the repeal of the clean energy tax credits.