Poll surge boosts Bachmann White House bid (AFP)

US Rep. Michele Bachmann speaks during the 2011 Republican Leadership Conference on June 17 in New Orleans, Louisiana. The Tea Party favorite plans to launch her Republican presidential bid late with a tour of key primary states Iowa, New Hampshire and North Carolina.(AFP/Getty Images/File/Justin Sullivan)AFP - Michele Bachmann's Republican presidential nomination bid received a boost with a poll showing her virtually tied with party frontrunner Mitt Romney in the key state of Iowa.