On May 8th–long before Rep. Joe Sestak (D-PA) made his primary challenge to Sen. Arlen Specter (D-PA) official–I wrote that “as long as Sestak’s running, or threatening to run, both men will feel the incentive to move left. That’s good news for progressives on its own, and even better if the brinksmanship results in a sort of political positive feedback loop, where each candidate does his best to prove himself more liberal than the other.”
This is a companion discussion topic for the original entry at https://talkingpointsmemo.com/?p=137027