Former vice presidential candidate and Alaska Gov. Sarah Palin addresses a Tea Party Express Rally in Manchester, N.H., Monday afternoon, Sept. 5, 2011. Palin left open the possibility of a presidential bid Monday afternoon, while encouraging tea party activists to unite against President Obama. (AP Photo/Stephan Savoia)Sarah Palin attends the TIME 100 gala celebrating the 100 most influential people, at the Time Warner Center, Tuesday, May 4, 2010 in New York. (AP Photo/Evan Agostini)