Snarlin’ Arlen Draws A Primary Opponent

This isn't exactly "first with the burst" news at this point, since outlets like TPM reported this news as early as last Wednesday. But it's the first time I've had a chance to weigh in on it, and there's no doubt that it's big news - even if it wasn't exactly a surprise. Joe Sestak had been making noises about potentially challenging freshly-minted "Democratic" Senator Arlen Specter almost since...