MoveOn PAC, OutServe and the Human Rights Campaign (HRC) are the among the groups joining Servicemembers Legal Defense Network (SLDN) on Friday for a rally urging senators to repeal “Don't Ask, Don't Tell” before the holiday break.

The noontime rally will be held at Upper Senate Park (Constitution Ave. and Delaware Ave., NE) in the District of Columbia.

The push to end the law that bans gay and bisexual troops from serving openly comes after the Senate held two days' worth of hearings on a Pentagon report that endorsed repeal. But Republicans – led by Arizona Senator John McCain, the ranking GOP member on the Senate Armed Services Committee – say they'll unite to block the measure.

“The lame-duck vote on repeal was set up and dictated by some of the same senators – like John McCain and Mitch McConnell – who are now delaying to kill the bill,” Aubrey Sarvis, executive director of SLDN, the largest group lobbying for repeal of the Clinton-era law, said in a statement. “They wanted the Pentagon report – now they have it. They wanted hearings – now they're done.”

“Senators must not be allowed to hide any longer behind process, procedure, and tax cuts for the wealthy, while the discrimination continues. We've lost 14,000 troops to this antiquated law, and by God, we must not lose another on our watch.”