From the Los Angeles Times:
When he announced the other day that he was switching to the Democratic Party, Pennsylvania Sen. Arlen Specter offered to return campaign donations from any contributors who might take offense.
Turns out that includes a lot of his Senate Republican colleagues who lent money to the cause.
Georgia Republican Johnny Isakson was first in line — asking Specter to return his $5,000 leadership political action committee contribution. Other Republicans requesting refunds on behalf of their PACs: Senate Minority Leader Mitch McConnell of Kentucky ($10,000), Tennessee Sen. Lamar Alexander ($5,000), Texas Sen. John Cornyn ($5,000) and Tennessee Sen. Bob Corker ($5,000).