Bob Kerrey bid causes left to lash outBy DAVID CATANESE | 3/2/12 6:16 PM EST Bob Kerrey took a lonely position against banning gay marriage in the 1990s. He opposed a ban on flag desecration, voted against welfare reform and ran up high Americans for Democratic Action scores while serving as the senator from one of the most conservative states in the nation. But when he announced his plans to run for his old Senate seat earlier this week, it was greeted with boos, hisses and expletives from the left. Welcome back to Washington, senator. While the Democratic establishment in...