It seems as if the Democrats are about to reclaim their title as “the party of no.” That might come as a shock to many Democratic apologists, but as the center-left loses control of the national debate, it is finding itself reacting to an agenda not set by its majorities in government but by the vocal right-leaning opposition. Not that there’s anything inherently wrong with saying “no.” It’s a good thing that liberals have consistently opposed anti-Muslim attempts to move the proposed Muslim community center in Lower Manhattan, decried the unnecessarily blunt — and unconstitutional — tool of the Arizona...