Sponsors of the bill to repeal the Defense of Marriage Act is being held by its sponsors pending the US Supreme Court ruling, Towleroad.com says:
Lawmakers are holding off on introducing legislation that would repeal the Defense of Marriage Act until after the Supreme Court rules on the anti-gay law, according to multiple sources familiar with the bill, as one Republican LGBT organization expects Sen. Rob Portman (R-Ohio) to sign on as a co-sponsor. A number of LGBT advocates familiar with the legislation, which has been known as the Respect for Marriage Act, told the Washington Blade its lead sponsors — Rep. Jerrold Nadler (D-N.Y.) in the House and Sen. Dianne Feinstein (D-Calif.) in the Senate — are delaying introduction until after the expected court ruling in June.
Makes sense, since the House would never go along with it anyway. Maybe they could pass ENDA in the meantime?