Ad War Update

The Romney campaign goes after Santorum's unapologetic Bush-era Republicanism in Michigan: 

Mitt stays on message in a spot marking the third anniversary of the stimulus bill: 

Meanwhile, Newt courts the "Latino crossover market" in Arizona:

And the DNC uses John McCain to question Romney's "private-sector experience": 

Previous Ad War Updates here, here, here, here, here, here, here, here, here, here, here, here, here, here, here, here, here, here, here, here, here, here, here and here.