WASHINGTON (TNND) — When the 119th Congress is sworn in on Friday, the House of Representatives' first order of business will be to elect a speaker of the House. With Republicans set to hold one of the slimmest majorities in almost a century, current Speaker Mike Johnson could be in for a tough fight to keep his job.

It takes 218 votes to be elected speaker. Republicans won 220 seats in November. Former Rep. Matt Gaetz, R-Fla., does not plan to return to Congress, bringing the number of GOP-held seats down to 219 for Friday's vote. Assuming Johnson gets no support from Democrats, that means he can only afford to have one Republican vote against him.

“It’s a numbers game," Johnson said Thursday morning. “I think we’ll get it done, I really do."

For weeks, Rep. Thomas Massie, R-Ky., has been adamantly opposed to Johnson for speaker.

"For months Democrats ignored the fact that Joe Biden was a potato. They convinced themselves that keeping him around was the pragmatic way to win the day. Too late did they admit the emperor had no clothes. Republicans are doing the same thing by keeping Speaker Mike Johnson," Massieposted on XTuesday.

Massie isn't Johnson's only problem: Rep. Chip Roy, R-Texas, is undecided.

“I remain undecided as do a number of my colleagues because we saw so many of the failures last year that we are concerned about that might limit or inhibit our ability to advance the president’s agenda," Roy said Tuesday.

Johnson also has to win over Rep. Victoria Spartz, R-Ind.

"We must have a vision and a concrete PLAN to deliver on President Trump’s agenda for the American people, which I have not seen from our current speaker despite countless discussions and public promises," Spartz said in a statement Monday.

Thursday morning, Johnson said he spent the holidays having conversations with holdouts. He said those discussions included potential House process reforms.

“I think the reason they’re all gonna vote yes is we’re shifting into a brand new paradigm. We have unified government that begins tomorrow," Johnson said.

Based on public statements of Republican lawmakers, the math hasn't moved in Johnson's favor. It could, however, if President-elect Trump, who endorsed Johnson for speaker, gets more involved. He told reporters on New Year's Eve he would make calls for Johnson "if necessary."

“He’s the one that can win right now," Trump said. "People like him. Almost everybody likes him. Others are very good, too, but they have 30 or 40 people that don’t like (them) so that’s pretty tough.”