Andrew O'Leary, executive director of the Democratic-Farmer-Labor Party, as the Democratic Party is known in Minnesota, says the link was provided by an outside researcher.
He says the party did not check the link before sending the release to the news media.
O'Leary says the party "obviously made a mistake."
The release challenged Pawlenty, a potential 2012 presidential candidate, for criticizing President Barack Obama at a Republican National Committee meeting.
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