Republican Sen. Charles Grassley of Iowa, who has not endorsed any candidate for president, said in an appearance on MSNBC on Friday that he does not believe there will be a clear winner in this year’s Iowa caucuses.

“Is the job of Iowa Republicans Tuesday night to pick a president or winnow the field?’ MSNBC’s Chuck Todd asked Grassley.

“Probably if Mitt Romney’s the winner, we’re picking a president,” said Grassley. “If there’s not a clear winner–and I don’t think there will be a clear winner–we’re winnowing the field.”

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