Besides conservative Republicans, who else hates Sen. Specter?

In the 60s Arlen Specter was on Congressman Gerald Ford's staff and served on the Warren Commission that investigated JFK's assassination. Specter was part of the team that determined that one bullet, the second shot, hit both JFK and Texas Gov. John Connally. All subsequent studies including the most recent ones using modern forensics techniques, confirm the accuracy of Specter's initial conclusions. Specter is therefore not only hated by conservative Republicans but by JFK conspiracy theorists.

Arlen Specter joins the long history of politicians switching parties including Gov. Connally who in 1973 switched from Democratic to Republican.