Is it time for Newt Gingrich to drop out? In an editorial published yesterday, National Review, the leading organ of the conservative movement, said the time has come for the former House speaker to leave the GOP presidential race. This editorial is a gut punch to an already staggering campaign. In the three weeks since the South Carolina primary, Gingrich’s stock has plummeted. Coming out of the Palmetto State, he “sounded really bad” in the two debates that preceded Florida, according to GOP analyst and Daily Beast contributor Rich Galen. The veteran pol may have been “sick, tired, or [just]...