Washington — Some political campaigns are marathons, but for U.S. Rep. Steve Scalise, of Jefferson, this one has been more of a sprint — and it ends Thursday afternoon when he finds out if he will take over the No. 3 spot in the ruling House Republican majority. That spot — majority whip — would represent the highest any Louisiana Republican has climbed in the U.S. House leadership (although one of his 1st Congressional District predecessors, Bob Livingston, came within an extramarital indiscretion of landing the top job of House speaker in 1998). The constituency for the leadership election is...