Toomey sent out a fundraising email Wednesday blasting the Obama administration for the scandal and asking his supporters to donate to "hold them accountable."

A number of Tea Party groups have used the Internal Revenue Service's targeting of their applications for nonprofit status as a rallying cry to raise funds from outraged supporters, but Toomey is one of the first actual lawmakers to get in on the act. He's long been a favorite, and leader, of the Tea Party movement.

"I am very upset by the news of the IRS targeting conservative groups," he writes. "There are some in the Obama administration who think the rules don't apply to them. They think they are above accountability. There are some in the administration who are determined to stifle conservative voices. They know — as we know — that if we conservatives get our message out, the public will be on our side."

Toomey then asks for donations to go "toe-to-toe" with the "Obama machine" in his 2016 reelection fight. He's likely to face a rematch with former Rep. Joe Sestak (D-Pa.), who Toomey defeated by a narrow margin in 2010.

The Pennsylvania website first reported on the fundraising email.