New Jersey Congressman Steve Rothman (Democrat) told Sirius Radio's OutQ program Tuesday that his lesbian stepdaughter changed his mind in favor of gay marriage.

Rothman told Michelangelo Signorile host of the Michelangelo Signorile Show that he now supports gay marriage.

Rothman announced he had joined the House Gay, Lesbian, Bisexual, Transgender Caucus in June, reports the online edition of The Advocate. The caucus formed by openly out Wisconsin Representative Tammy Baldwin (Democrat) and Massachusetts Representative Barney Frank (Democrat) is designed to broaden Congressional awareness of GLBT issues.

The 55-year-old congressman has been a long supporter of civil unions. He said his 19-year-old stepdaughter, who is a lesbian, changed his position on the issue.