From CNN's Jessica Dean and Annie Grayer

A second ballot for House speaker is underway after Rep. Kevin McCarthy fell short on votes in the first ballot – something that hasn’t happened since 1923.

McCarthy has already lost more votes than he can afford in the second round of the speaker vote.

At least 218 votes are needed, but the number required could change if members withhold their votes.

Rep. Matt Gaetz nominated Rep. Jim Jordan to be the House speaker. Jordan, in an effort to show unity, had earlier nominated McCarthy ahead of the second round of voting.