After a poorer-than-expected showing in November midterm elections, McCarthy's fellow Republicans have been embroiled in a public brawl over who should lead their party once it assumes control of the House.

A group of hardline conservatives oppose McCarthy's candidacy, concerned that he is less deeply vested in the culture wars and partisan rivalries that have dominated the House and even more so since Donald Trump's White House years.

They have criticized the California Republican for not taking a more aggressive stance against Democrats, who under Speaker Nancy Pelosi had been in control, on priorities including government funding, defense and border security.

Representatives Bob Good and Matt Gaetz are among five Republican lawmakers who have said they would not back McCarthy.

With a narrow 222-213 Republican majority, McCarthy can afford to lose just four votes from his caucus to win the 218 he needs, or half of the chamber's 435 members. No Democrats are likely to vote for him.

"I won't be voting for Kevin McCarthy tomorrow. He's part of the problem. He's not part of the solution," Good told Fox News on Monday. "There's nothing that indicates to me that he's going to change his pattern since he's been in leadership, where he's part of the swamp cartel."

In an interview last week with the conservative Daily Caller website, Gaetz said: "I think he's just a shill of the establishment. I think that Kevin McCarthy is little more than a vessel through which lobbyists and special interests operate."

Asked if he had the votes as he walked through the Capitol on Monday, McCarthy told reporters, "I think we're going to have a good day tomorrow."

During a Sunday evening conference call, however, McCarthy could not tell Republican lawmakers he had secured enough votes for the speakership, the New York Times reported, citing two people familiar with the call.

The speaker will set the House legislative agenda during a period of divided government in Washington, with President Joe Biden's Democrats retaining the White House and Senate. The power struggle could undermine House Republicans' hopes of moving forward quickly on investigations into Biden's administration and family.

McCarthy, the House minority leader, who was nominated for the speakership in November by 188 of his fellow Republicans, made some concessions over the weekend but they did not go far enough for some.

A New Year's Day letter from nine unsatisfied conservative Republican lawmakers, posted on Twitter, said "there continue to be missing specific commitments with respect to virtually every component of our entreaties."

The letter also said "the times call for radical departure from the status quo -- not a continuation of past, and ongoing, Republican failures."

(Reporting by Doina Chiacu; Editing by Howard Goller)

By Doina Chiacu and David Morgan