FILE - In this Dec. 31, 2007, file photo, then-Democratic presidential hopeful Sen. Hillary Rodham Clinton, D-N.Y., smiles while speaking at a campaign stop at Muscatine West Middle School in Muscatine, Iowa. Clinton last left Iowa on an “excruciating” night, the beginning of the end of her White House campaign. She returns for the first time this weekend, not quite yet running for president, but sure to hear cheers from a crowd of Democrats hoping she will. (AP Photo/Jeff Chiu, File)