Speaker-designate Steve Scalise (R-La.) is struggling to win the support he will need to be elected to the top spot on the House floor, signaling what could be a sequel to his predecessor’s fight to win the gavel in January. Scalise scored a victory on Wednesday by defeating House Judiciary Committee Chairman Jim Jordan (R-Ohio) in the conference’s internal vote to become the GOP nominee for Speaker. But the tally was a slim 113-99 victory, with around a dozen votes for others or “present” — and even after Jordan swung his support to Scalise following the vote, it was unclear...