Pennsylvania Gov. Ed Rendell holds a pro Hillary Rodham Clinton campaign sign as he marches in the St. Patrick's Day Parade in Scranton, Pa., in this March 15, 2008, file photo. A pollster reached Rendell, one Clinton's most visible supporters, at his Philadelphia home during the April 6-7 weekend, wanting his opinions on the Democratic presidential race between Clinton of New York and Barack Obama of Illinois in the April 22 Pennsylvania primary. The Governor was better prepared than most of the 1,340 likely Democratic voters, who took part in the poll. (AP Photo/David Kidwell, File)

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