The left has collapsed. Its political support has collapsed. Public opinion polls point to a historic repudiation of the president and the Democratic party this fall, something on the order of a 60-seat Republican gain in the House. The GOP has an outside shot at taking the Senate as well. Its claim to intellectual integrity has collapsed. Paul Krugman, Ivy League professor, New York Times columnist and Nobel laureate (the holy trinity of the liberal establishment), has humiliated himself with a startlingly dishonest attack on Paul Ryan's budget proposal. Krugman, called out by Ryan, rebuked by honest analysts and unwilling...