Appearing on Fox News Sunday, Defense Secretary Robert Gates said President Barack Obama might reject a bill that repeals “Don' Ask, Don't Tell,” the AP reported.

Late last month, the House approved a version of the Defense Authorization Bill that includes Pennsylvania Rep. Patrick Murphy's amendment that repeals the 1993 law that forbids gay troops from serving openly. The Senate is expected to take up the issue next month after the Senate Armed Services Committee voted in favor of attaching similar repeal language to their version of the defense bill.

Last fall, Obama promised the gay community he would repeal the law.

“I will end 'Don't Ask, Don't Tell',” Obama said in October at a fundraiser for the Human Rights Campaign (HRC), the nation's largest gay rights advocate. “That is my commitment to you.”

But Gates said Sunday that Obama probably still would veto the spending bill if it includes defense projects labeled as wasteful.

Gates said he would like to see the bill shed a transport aircraft favored by some lawmakers.

Over 13,000 gay service members have been fired under DADT.