He has been out of office for six months, but House Democrats have recruited former Pennsylvania Rep. Patrick Murphy in the fight to rally the liberal base.

The Democratic Congressional Campaign Committee distributed an email from Murphy over the weekend accusing House Republicans of trying to delay or block the repeal of “don’t ask, don’t tell.”

The repeal, which allows openly gay service members in the military, was approved at the end of the last Congress but has yet to be fully implemented.

“When I served in Congress, it was an honor to sponsor and fight for legislation to finally end this discriminatory policy,” wrote Murphy, who is now running for Pennsylvania attorney general. “Now, we must keep the pressure on, by exposing the despicable tactics that the Republicans are using to stop the repeal from taking effect.”

He asked supporters to help the DCCC gather 100,000 signatures online.