http://www.slate.com/articles/news_and_politics/politics/2015/10/nancy_pelosi_should_help_elect_kevin_mccarthy_speaker.html

House Republicans are in a bit of a bind. A majority of the caucus will very likely vote on Thursday to nominate Rep. Kevin McCarthy of California as the next speaker. But being elected speaker of the House requires an absolute majority of the chamber, not just of the majority party. Usually, once the majority caucus has chosen a candidate, the members of that party line up (nearly) unanimously behind that candidate. But Rep. Jason Chaffetz of Utah (so far as I know, no relation) is challenging McCarthy, counting on support from the roughly 40-member “Freedom Caucus” (though it might prefer the “Tortilla Coast Caucus” these days). Chaffetz has insisted that many members of that group would be unwilling to vote for McCarthy on the floor. In fact, he told the New York Times that McCarthy “can’t get to 218” votes.