**FILE** Democratic presidential hopeful Sen. Barack Obama, D-Ill., laughs with Rev. Al Sharpton during a speech to an audience at the 9th annual National Action Network convention Saturday, April 21, 2007 in New York. (AP Photo/Frank Franklin II)
President Barack Obama is given an "I'm an Obamanaut" bumper sticker at NASA operations at the Kennedy Space Center in Cape Canaveral, Fla., April 15, 2010. (Official White House Photo by Pete Souza)