Two weeks after independent Massachusetts gubernatorial candidate Tim Cahill attended the big tea party on Boston Common, he's getting hit with a seven-figure attack ad from the Republican Governors Association. The RGA's strategy, as the Boston Globe points out, is to do what it did to Chris Daggett, the 2009 independent candidate for governor of New Jersey, and inform voters that Cahill is even worse than the Democratic incumbent, Gov. Deval Patrick (D-Mass.). The problem is that Daggett ran generally to the left of now-Gov. Chris Christie (R-N.J.). Cahill is running to the right of the field in Massachusetts, gunning...