2012 GOP Invisible Primary By bbainou May 11, 2011 Gingrich Enters Race Period: May 11, 2011 to May 2, 2012 Gingrich Campaign (357 days) May 13, 2011 Paul Enters Race Period: May 13, 2011 to May 14, 2012 Paul Campaign (367 days) May 21, 2011 Cain Enters Race Period: May 21, 2011 to Dec 3, 2011 Cain Campaign (196 days) May 23, 2011 Pawlenty Enters Race Jun 2, 2011 Romney Enters Race Period: Jun 2, 2011 to Nov 6, 2012 Romney Campaign (523 days) Jun 6, 2011 Santorum Enters Race Period: Jun 6, 2011 to Apr 10, 2012 Santorum Campaign (309 days) Jun 21, 2011 Huntsman Enters Race Jun 21, 2011 Roemer Enters Race Period: Jun 21, 2011 to Jan 16, 2012 Huntsman Campaign (209 days) Jun 27, 2011 Bachmann Enters Race Period: Jun 27, 2011 to Jan 4, 2012 Bachmann Campaign (191 days) Aug 13, 2011 Perry Enters Race Period: Aug 13, 2011 to Jan 19, 2012 Perry Campaign (159 days) Nov 6, 2012 Election Day