Republican strategist Karl Rove called President Obama’s recent attacks on GOP candidate Mitt Romney “gutter politics of the worst Chicago sort” and said the campaign is making a big mistake.

“If the president continues to make this charge — this outrageous charge — that his campaign had that Romney is guilty of felonious activity [and] committed a felony, that’s a big mistake,” said Rove on Fox News Sunday.

“Remember who’s up for grabs in this election: independent voters. They were drawn to Obama in 2008 because he was going to change politics and raise and elevate the political discourse. This is gutter politics of the worst Chicago sort.”