>> and who too often fails to stand against our enemies. we cannot afford four more years of barack obama. [applause] >> reporter: congresswoman michelle bachman of nearby minnesota here in her hometown of water lieu, iowa formally entering the 2012gop nominating race. politically a very important day because she starts this racy sepbgs alley as the frontrunner, a fire brand conservative aggressively going after the president, a tea party favorite, founder and chairman of the tea party caucus. she says that will be a big part of her coalition. she completely changes the race with this word that she's essentially contending as the prohibitive frontrunner in iowa, save mitt romney no other republican hits double digits other than herman cane.