Maryland Gov. Martin O'Malley, left, signs an autograph for Terry Stewart, of Dubuqe, Iowa, after speaking at U.S. Sen. Tom Harkin's annual fundraising steak fry, Sunday, Sept. 16, 2012, in Indianola, Iowa. O'Malley, chairman of the Democratic Governors Association, is walking an early — and tricky path — into presidential proving ground Iowa on Sunday, less than 60 days before the 2012 election. (AP Photo/Charlie Neibergall)

Associated Press
Maryland Gov. Martin O'Malley, left, signs an autograph for Terry Stewart, of Dubuqe, Iowa, after speaking at U.S. Sen. Tom Harkin's annual fundraising steak fry, Sunday, Sept. 16, 2012, in Indianola, Iowa. O'Malley, chairman of the Democratic Governors Association, is walking an early — and tricky path — into presidential proving ground Iowa on Sunday, less than 60 days before the 2012 election. (AP Photo/Charlie Neibergall)
Maryland Gov. Martin O'Malley, left, signs an autograph for Terry Stewart, of Dubuqe, Iowa, after speaking at U.S. Sen. Tom Harkin's annual fundraising steak fry, Sunday, Sept. 16, 2012, in Indianola, Iowa. O'Malley, chairman of the Democratic Governors Association, is walking an early — and tricky path — into presidential proving ground Iowa on Sunday, less than 60 days before the 2012 election. (AP Photo/Charlie Neibergall)
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