So Arlen Specter and Joe Sestak are going to hold a forum at Netroots Nation next month. Greg Sargent had this to say:

Specter's willingness to brave the precincts of Netroots Nation with netroots hero Sestak underscores how seriously Specter takes Specter's underdog challenge. Given that Specter has the backing of the White House and the Democratic establishment, his scheduled appearance is also a sign that even the most established incumbent can no longer risk taking netroots-backed challengers for granted.

I think it also shows that Specter isn't getting the sincere support of the White House. He's getting "support" but he's not having people from the Obama Administration out in rural Pennsylvania talking up the many merits of keeping Arlen Specter in the senate. Well, there aren't many merits so might as well save on air fare.