Call them Screamers. Dozens of purportedly patriotic citizens, bussed or flown to out of state political events with instructions from corporate-political front groups to pose as local constituents and engage in a most un-American practice. The ugly tactic may look like a new gimmick in the conservative bag of tricks. But as Rachel Maddow explains, it's just a slight rewrite of the same nasty script used by the usual thuggish suspects almost a decade ago, followed by eight subsequent years of dreadful consequences: