Screenwriter Dustin Lance Black has accused Rick Santorum of lying about gay rights.

The openly gay Black wrote 8, the play based on the trial over the constitutionality of California's gay marriage ban, Proposition 8.

The play has raised more than $3 million for the American Foundation for Equal Rights (AFER), the group formed specifically to challenge the law in court.

The play's Los Angeles reading was led by an all-star cast, including George Clooney, Brad Pitt and Kevin Bacon.

During an interview on the live Internet show What's Trending, Black told host Shira Lazar that he would like to put Santorum and the remainder of the GOP presidential field on the witness stand.

“I would love to call them into court and get them to raise their right hand. I think each of them, if they said what they've been saying in these debates, they would be perjuring themselves. Because there is no proof for what they're saying. There's no facts to back it up. And that's what we saw in that courtroom. When you're called into court and you have to raise your right hand and testify to 'tell the truth, the whole truth and nothing but' the things they're saying – the hateful things, the stereotypes and lies that we've heard for generations – fall apart.”

“So I dare Rick Santorum to raise his hand and swear to tell the truth and say the things he's been saying about gay people,” Black added. (The video is embedded in the right panel of this page. Visit our video library for more videos.)