Unfortunately, the leadership of Frist and Santorum et.al. that supported Specter's campaign will never have the stones to block his ascension to the chairmanship of the committee that he has dreamed about for so long. This is where he wants to make his mark in history and it ain't gonna be one that we'll like.
The Republicans did fight harder for principle when they were in the minority and when there was a Dem president. I don't want to cede the majority, but I agree, it won't be the end of the world if we do.
Don't be afraid to pester the RNC, Senate Campaign Committee, Bush/Cheney Election Committee, etc...
If Bush really wants Specter relected he might strongly suggest that he compromise a little.
I would contact the prolife organizations in your state about Spectpr's intent to block the appointment of a prolife Arkansas district judge even though Arkansas' two Democrat senators support him. http://www.freerepublic.com/focus/f-news/1144839/posts