From Center for Responsive Politics --
The Club for Growth has been permitted by the Federal Election Commission to use data disclosed via campaign finance reports to contact donors to Sen. Arlen Specter, the long-time Pennsylvanian Republican who joined the Democratic Party earlier this year.
The conservative group will not be contacting these individuals to ask for money, nor with a recommendation of their preferred candidate -- former Club for Growth president and former GOP Congressman Pat Toomey. Instead, they hope to be a thorn in the side of Specter's campaign operation by providing Specter's donors with a preprinted form requesting a refund of their contributions.
At the time of his party switch, Specter promised to voluntarily refund any donor who wanted their money back now that he was standing for re-election as a Democrat. More...