A House co-sponsor of Maryland's gay marriage bill has deleted a tweet in support of the bill, angering his progressive base.

Delegate Sam Arora, a freshman delegate from Derwood, won the endorsements of Progressive Maryland, Equality Maryland and the Washington Post in part due to his commitment to marriage equality.

“I am a former law clerk to Attorney General Doug Gansler,” Arora wrote as an addendum to his questionnaire for Equality Maryland. “I publicly supported his decision to recognize out-of-state marriage licenses for same-sex couples and immediately put out a release praising his findings. For me, it's simply a matter of equal rights under the law.”

Arora sits on the House Judiciary Committee that is expected to vote on the measure Friday.

He began signaling a change of heart early in the week, telling the Baltimore Sun that he would vote for the bill in committee because “This bill deserves an up-or-down vote, so I'm voting to send it to the floor.”

Then, on Thursday morning, alarms went off when he tweeted, “Hearing from constituents, friends. Please keep sending your thoughts (sam.arora@house.state.md.us). Thinking and praying hard.”

Bloggers at AMERICAblog Gay noticed that Arora had also deleted a January 25 tweet in which he boasted about his co-sponsorship of the bill.

“I co-spons'd the Relig. Freedom & Civil Marriage Prot. Act. It will couple civil marriage equality & relig. free exercise protections in Md,” Arora messaged.

The revelation angered former supporters on Facebook.

“Maybe the only thing worse than being a bigot is being a hypocritical lying bigot,” wrote Stephen Clark.

“You have no integrity,” added Susan Vargo.

David Chamberlain noted: “If you wanted to support discrimination against gay people, you should have run as a conservative Republican. Instead, you ran as a progressive Democrat.”

“By making campaign promises that you don't intend to keep, for the sole purpose of raking-in donations from Progressive and LGBT-friendly voters, you represent the worst in American politics. Enjoy your one term,” Zach Stewart wrote.