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In a series of posts on his social media platform Wednesday night as the House was gearing up for a crucial procedural vote on his massive tax and policy bill, President Donald Trump sought to cheer on Republicans and insulted a Democratic member.

"The USA is on track to break every record on GROWTH. Go Republicans, beat the Crooked Democrats tonight!" Trump posted shortly after 9:30 p.m., around the time voting began on the procedural motion. "PRO-GROWTH Tax Cuts never fail. MAKE AMERICA GREAT AGAIN!"

About 10 minutes earlier, Trump posted a statement targeting Rep. Jamie Raskin with a string of insults.

"Rep. Jamie Raskin, a third rate Democrat politician, has no idea what is in our fantastic Tax Cut Bill, nor would he understand it if he did. This DOPE has been consistently losing to me for YEARS," Trump said.

He closed with, "Raskin is a bad politician, and a TOTAL LOSER!"

House Speaker Mike Johnson said he plans to keep the rule vote “open as long as it takes” to advance President Donald Trump’s massive tax and policy bill.

“I'll keep it open as long as it takes to make sure we've got everybody here and accounted for and all the questions answered,” Johnson said during a phone interview with Fox News’ Sean Hannity.

"I made that commitment to my members. You know, we're in an era of Congress where we have small margins, small majorities, and that makes it, by necessity, a bottom-up institution.”

The rule vote has been open for nearly 2 hours.

GOP leaders have been huddling with the holdouts to try and flip their votes.

Johnson said Trump has been “deeply involved” in the megabill negotiations.

Asked if Trump has spoken directly to members tonight, Johnson said, “He has been.”

“In fact, he called me most recently about an hour ago and said, ‘Who else needs to have a discussion? I’m ready to get on the phone.’ And I said, ‘Mr. President, you’ve done your job, and we’ll do ours here,’” Johnson said.

The speaker continued to express optimism about getting the bill across the finish line by Independence Day.

“So, we are going to get this job done. Everybody will celebrate together, but the real celebration will be by the American people, because they are going to see the effects of this quickly,” he said.

-ABC News' Lauren Peller

Speaker Mike Johnson expressed confidence as the House attempted to move forward to pass Trump’s tax and immigration megabill, telling reporters “It’s been a good day” despite being stuck in legislative quicksand all afternoon and into the late evening.

“Well, it's been a long, productive day. We've been talking with members from across the conference and making sure that everyone's concerns are addressed and their questions are answered, and it's -- it's been a good day,” Johnson said. “We're in a good place right now. This is the legislative process. This is exactly how I think the framers intended for it to work.”

While it was uncertain whether Johnson had the votes to pass the bill, he predicted Republicans will deliver.

“We feel very good about where we are and we're moving forward,” Johnson said. “So we are going to deliver the big, beautiful bill, the president's American First agenda, and we're going to do right by the American people. This is going to be a great thing for the country. Look forward to moving it forward.”

-ABC News’ Arthur Jones II, John Parkinson, Lauren Peller and Jay O’Brien

After a long delay, the House is voting on a procedural motion, known as a rule, to advance the Trump megabill to the floor for full consideration. This is a high-stakes vote to see if Republicans can move forward on the megabill. It is a five-minute vote, but GOP leaders could hold the vote open for hours to flip holdouts.

Speaker Mike Johnson can afford to lose only three votes with perfect attendance.

Rep. Steve Womack closed out the seven-hour vote, which broke a record in modern congressional history, emphasizing “this is a five-minute vote!” which drew laughter from the chamber.

The procedural vote started a little after 2 p.m. and just wrapped up, surpassing the previous record on Nov. 5, 2021, when Democrats held open a vote for seven hours and six minutes on a GOP motion to adjourn as they tried to secure support for the Infrastructure Investment and Jobs Act and Build Back Better.

-ABC News’ Lauren Peller, John Parkinson and Arthur Jones II