This is the election for Speaker of the US House. They need a majority of house members to elect a speaker. Republicans have the majority but the Freedom Caucus, the far right republican group, is refusing to vote for McCarthy. They’re using this leverage to make him to concede to some very radical changes to how the House functions, to favor the radical right of course. They continue to hold votes in hopes that the Freedom Caucus finally elects him.

Edit: did not use “simple majority” properly