Specter was actually up in 2010, not 2008. Senators serve 6 year terms.
However, noteworthy is the fact at that the time of Santorum’s endorsement, Specter had a strong history of opposing such health care schemes, and is regarded as one of the key architects in illustrating how horrific government run healthcare was back in the debate over Hillarycare. He directed his staff to make a complete list of all of the boards, commissions, etc. that would have created a bureaucratic nightmare and they in turn used it to create a chart for him - Senator Bob Dole used the chart in his response to Clinton’s State of the Union address and he referred to it as his ‘best friend’. The chart helped to illustrate to the public how awful this kind of healthcare scheme is.
Here’s a video of Specter from 1994 on the floor of the Senate discussing the chart:
http://www.youtube.com/watch?v=73WIYWWiAlA&feature=related
It’s really sad when you can’t add anymore... Thanks for the correction. Now I have to go get my post deleted..... :-)