Sen. Arlen Specter’s party-switching has sent reverberations through the political world and the Republican Party. And the blame game has begun already.

A political food fight of a sort has broken out between Club for Growth (the organization which Specter’s challenger Pat Toomey previously headed) on one hand, and Ramesh Ponnuru and Sen. Lindsay Graham on the other. The latter two blame Club for Growth for narrowing the Republican Party. Club for Growth responds that the GOP is better served by vibrant conservatives, arguing that Specter is precisely the type of opportunistic politician who has hobbled the GOP and turned off voters. Both have a point, but as with everything the devil is in the details.