Not surprisingly, Mitt Romney’s Super PAC is now going after Rick Santorum. Romney’s team has no choice, as Romney’s support is plummeting, yet all the negativity surrounding Romney’s attack ads is taking its toll on Romney as well. He’s a lame candidate, and his only strategy seems to be tearing apart even lamer candidates. His support among independents is tanking, and his “severely conservative” speech is making him a laughing stock with conservatives.

As for Santorum, he’s vulnerable to attack for many reasons. In a general election he’ll have to answer for his extreme positions on social issues, but he’s also the poster child for Republican mistakes during the Bush years when they spent like crazy trying to keep their majority.

Yet even with all these vulnerabilities, the Romney ad comes across as a series of cheap shots. Sure, Santorum voted to increase the debt limit, but everyone was voting that way, including practically all Republicans when Bush was president.

I still have no idea how this is going to play out, but whoever emerges from this savage primary season will be very damaged heading into a general election.