LIKE NIGHT FOLLOWS DAYMitt Romney follows the same dark path toward atavism as every other GOP frontrunner: it’s in the gene poolhttp://tpmdc.talkingpointsmemo.com/2011/04/romney-stumbles-over-hang-him-gaffe-aimed-at-obama-video.phpIn New Hampshire Friday, Mitt Romney stumbled over a line about pinning the nation's melancholy on President Obama that found him scrambling to back away from a quote