Brian Brown, president of the National Organization for Marriage (NOM), on Saturday questioned Liz Cheney's claim that she's not “pro-gay marriage.”

Cheney, the daughter of former vice president Dick Cheney, announced last month that she will be challenging Wyoming Senator Mike Enzi in the Republican primary. Dick Cheney has previously said that he supports the marriage of his daughter Mary Cheney, who is openly gay.

“I am strongly pro-life and I am not pro-gay marriage,” Cheney said in a statement posted on her website. “I believe the issue of marriage must be decided by the states, and by the people in the states, not by judges and not even by legislators, but by the people themselves.”

Brown questioned Cheney's assertion in a blog post.

“Liz Cheney now says she is not 'pro gay marriage', but she has long opposed a constitutional amendment to protect marriage as the union of one man and woman,” Brown said. “If she truly supported protecting marriage, she would change her position and support both a Wyoming constitutional amendment and federal amendment to protect marriage. Luckily, there is a candidate in this race who has done more than give lip service to traditional marriage: Mike Enzi. He not only supported a marriage amendment, but actually co sponsored it.”