Mitt Attacks Rick - Gently...

Mitt Romney is running an attack ad against Rick Santorum in Michigan and Ohio, where a new Quinnipiac poll also shows Santorum in the lead. But does it have enough muscle to stem the tide?

Former Pennsylvania Sen. Rick Santorum shoots to the top among Ohio likely Republican primary voters with 36 percent, followed by 29 percent for former Massachusetts Gov. Mitt Romney, according to a Quinnipiac University poll released today.

Former House Speaker Newt Gingrich runs third with 20 percent, while Texas U.S. Rep. Ron Paul gets 9 percent.

Mitt's team apparently fears backlash if it were to hit Santorum as hard as it did Gingrich. Besides, Rick's a likeable guy.