Newt Gingrich's lesbian half-sister Candace Gingrich-Jones has told Rachel Maddow that she'll vote for President Barack Obama in 2012.

Gingrich-Jones, who works for the Human Rights Campaign (HRC), the nation's largest gay rights advocate, appeared Wednesday on MSNBC's The Rachel Maddow Show.

This week, Texas Governor Rick Perry's campaign went decidedly anti-gay in a last-minute shift designed to win over Iowa evangelicals.

When Maddow asked Gingrich-Jones if she thought Gingrich would follow, she said it wouldn't surprise her.

“I wouldn't put it past any of the GOP presidential candidates. It's historically been one of the things – a tactic – that's used,” she said.

On Gingrich's opposition to gay rights: “I think that if he is a politician and saying these things because he's a politician but he doesn't believe them, or if he does believe them, I don't know if I like either of those answers very much. I know that at the end of the day, he's wrong.”

And Gingrich-Jones added that her half-brother is not counting on her support.

“I don't think he has any misconception that I might be” supporting his candidacy, she said.