Since he's across the border, I suppose it's local enough to opine on, but Sen. Jim DeMint - gunning with our own Rep. Paul Broun for most delusional elected conservative - suggests that the reason Sen. Arlen Specter switched parties was because 'forced unionization' drove people away from Pennsylvania and into the arms of anti-union havens like South Carolina.

Of course, this doesn't really make sense seeing how, since 1990, Pennsylvania has added more than 1 million people to its population, while South Carolina has added a little more than 500,000. There's also the fact that Democrats almost doubled their advantage in voter registrations in the Keystone State, and such an advantage was overwhelmingly fueled by Republicans switching their party affiliation.