President Donald Trump is cheering on the GOP's landmark spending and tax cut bill, as it faces judgment day in the Senate.

"ONE GREAT BIG BEAUTIFUL BILL, is moving along nicely!" the president wrote in a social media post hours before the Senate on Monday began to take a slew of votes on the Republican-crafted measure.

The bill, which the president is insisting pass Congress and reach his desk by this Friday, July 4, is stuffed full of Trump's campaign trail promises and second-term priorities on tax cuts, immigration, defense, energy and the debt limit. 

It includes extending his signature 2017 tax cuts and eliminating taxes on tips and overtime pay, providing billions for border security and codifying his controversial immigration crackdown.

SENATOR'S ENTER VOTE-A-RAMA ON TRUMP'S MASSIVE BUDGET BILL

However, many of the latest national surveys indicate that Americans are far from thrilled with the measure.

By a 21-point margin, voters questioned in the most recent Fox News national poll opposed the federal budget legislation (38% favored vs. 59% opposed), which passed by the House of Representatives by just one vote last month.

HEAD HERE FOR THE LATEST FOX NEWS POLLING 

The bill was also underwater in national surveys conducted this month by the Washington Post (minus 19 points), Pew Research (minus 20 points) and Quinnipiac University (minus 26 points).

As Democrats attack the bill, they’re highlighting the GOP’s proposed restructuring of Medicaid — the nearly 60-year-old federal program that provides health coverage to roughly 71 million low-income Americans. Additionally, Senate Republicans increased cuts to Medicaid over what the House passed.

DEMOCATS' DELAY TACTIC ENDS, DEBATE BEGINS ON TRUMP'S 'BIG, BEAUTIFUL BILL'

The changes to Medicaid, as well as cuts to food stamps, another one of the nation's major safety net programs, were drafted in part as an offset to pay for extending Trump's 2017 tax cuts, which are set to expire later this year. The measure includes a slew of new rules and regulations, including work requirements for many of those seeking Medicaid coverage.

Meanwhile, Republicans criticize Democrats opposing the bill for voting to increase taxes on most Americans.

About half of respondents questioned in the Fox News poll said the bill would hurt their family (49%), while one quarter thought it would help (23%), and another quarter didn't think it would make a difference (26%).

Sixty percent felt they had a good understanding of what is in the measure, formally known as the One, Big, Beautiful Bill, and while those voters were more likely to favor the legislation than those who are unfamiliar with it, more still think it will hurt rather than help their family (45% vs. 34%).

The latest surveys all indicate a wide partisan divide over the measure.

According to the Fox News poll, which was conducted June 13-16, nearly three-quarters of Republicans (73%) favored the bill, while nearly nine in ten Democrats (89%) and nearly three-quarters of independents (73%) opposed the measure.

Fox News' Dana Blanton contributed to this report.

Philip Low, a former friend of Elon Musk, claimed in an interview on Monday that Musk would do everything he could to damage President Donald Trump, Politico reported.

"I’ve had my share of blowouts with Elon over the years," Low told Politico. "Knowing Elon the way I know him, I do think he’s going to do everything to damage the president."

Musk has spoken out against the GOP's "one big, beautiful bill," calling it "a disgusting abomination" in a June 3 post to X. 

The former ex-DOGE head renewed attacks against the bill on Saturday, arguing on X that it would destroy millions of jobs and "cause immense strategic harm to our country."

"He has been humiliated," Low told the outlet. "The whole idea that Elon is going to be on his side and help woo Congress and invest in election campaigns for right-wing judges — Elon might do all of that, but deep down, it’s over."

'HE'S NOT A BIG FACTOR': TRUMP'S SENATE ALLIES DISMISS ELON MUSK'S CALLS TO 'KILL THE BILL'

Low, a neuroscientist and founder of the company NeuroVigil, has known Musk for 14 years and fired him from NeuroVigil's board after Musk expressed he wanted to be taken off the advisory board, Politico reported, in order to prevent him from exercising stock options.

The report added both Musk and Trump's sides say tensions have cooled since their viral online spat earlier this month, but Low suggested Musk is just biding his time. Musk even apologized, and Trump said there were no "hard feelings."

White House spokesperson Harrison Fields said in a statement to Politico, "Politico’s fixation on another palace intrigue non-story is laughable and fundamentally unserious. The President is focused on Making America Great Again by securing our border, turning the economy around, and pursuing peace around the globe."

Senate Republicans successfully carried the legislation over a procedural hurdle late on Saturday in a 51-49 party-line vote after hours of negotiations. All Republicans voted in support of advancing the bill except for Sens. Thom Tillis, R-N.C., and Rand Paul, R-Ky.

ELON MUSK WARPATH AGAINST TRUMP'S 'BIG, BEAUTIFUL BILL' RATTLES HOUSE GOP

Following the procedural vote, Senate Minority Leader Chuck Schumer, D-N.Y., required clerks on the Senate floor to read the entire 940-page Senate GOP version of Trump’s megabill. The delay tactic stalled debate on the package by about 16 hours.

The bill has been projected by the Congressional Budget Office to add trillions to the country's already rising $36.2 trillion national debt.

A representative for Musk's company, SpaceX, did not return a request for comment.  

Low urged Trump to listen to some of Musk's policy beliefs.

"Elon has wooed enough of Trump’s supporters to be an actual threat politically," Low told Politico.  "He doesn’t realize the battle that he has on his hands, and one way to cut the support away from Elon is to actually adopt some of the things he is for."

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Trump said Sunday that Musk is a "wonderful guy" despite their differences on Trump's big, beautiful bill. The president has previously said Musk has "lost it" over his criticism of the legislation.