There are some Republican-oriented congressional districts where bucking the party line on high-profile issues is a smart political play. South Carolina’s 4th District, however, is not one of them. For that reason, Rep. Bob Inglis (R-S.C.) finds himself in a battle to win his own party’s nomination for reelection. In the deeply conservative, church-filled 4th — home to Bob Jones University and an outspoken and politically active evangelical base — Inglis’ apostasy on issues ranging from climate change to Iraq to the Pledge of Allegiance has already earned him four primary opponents and the prospect of more to come. Inglis...