House Majority Leader Eric Cantor's primary loss means Congress will soon say goodbye to its only Jewish Republican. And not only that; it also means there will likely be no Republicans in Congress who profess to be anything other than a Christian. According to data collected by the Pew Forum at the start of the 113th Congress last year, the GOP conference was 69 percent Protestant, 25 percent Catholic, 4 percent Mormon and 1 percent Orthodox Christian. Cantor (Va.) was the only member of any other faith on the Republican side in either the House or the Senate -- out...