The Domestic Partnership Benefits and Obligations Act, S. 1529, would ensure that same-sex domestic partners working for the federal government receive the same benefits as legally married spouses.

“This change is both fair policy and good business practice,” Collins said. “The federal government must compete with the private sector when it comes to attracting the most qualified, skilled and dedicated employees.”

Collins cited an Office of Personnel Management (OPM) report that said 60 percent of Fortune 500 companies extend employment benefits to domestic partners.

Their bill would allow same-sex partners of federal employees to participate in federal retirement, life insurance, health, workers’ compensation, and Family and Medical Leave benefits even if they live in a state that doesn’t recognize gay marriage.

Reps. Mark PocanMark William PocanOvernight Defense: Over 500 amendments proposed for defense bill | Measures address transgender troops, Yemen war | Trump taps acting VA chief as permanent secretary Lawmakers seek to limit US involvement in Yemen's civil war The curious case of Andrew McCabe's legal defense fund MORE (D-Wis.), Ileana Ros-Lehtinen (R-Fla.) and Gerry ConnollyGerald (Gerry) Edward ConnollyOvernight Defense: Senate confirms Haspel as CIA chief | Trump offers Kim 'protections' if he gives up nukes | Dem amendments target Trump military parade Dem plans amendment to block Trump from using military bases to house undocumented minors separated from parents Politicians, media explode over White House aide's comments MORE (D-Va.) have introduced a companion measure in the House.

Lawmakers have increased their calls for equal employment benefits for gay couples since the Supreme Court ruled this summer that parts of the Defense of Marriage Act (DOMA) were discriminatory. Some conservatives still argue marriage should be between a man and a woman.