Republicans have shifted their strategy on ObamaCare. Weeks ago, many Republicans said ObamaCare—including Speaker John Boehner (Ohio)—was too broken to fix. But now, the GOP is drafting legislation that aims to do just that. The GOP wants to rebuild its political capital and public credibility by solving ObamaCare’s implementation problems. This pivot comes after Republicans took major hits in polls following the government shutdown. The House this week will vote on a measure called, “Keep Your Health Plan Act.” It aims to do what the president promised years ago: If you like your health plan, you can stay on it....