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 PocanA message of thanks and hope from a Palestinian to American lawmakers Dems to Mattis: Don't delay transgender enlistment policy Progressive Caucus elects Wisconsin lawmaker as new leader MORE (D-Wis.), Ileana Ros-Lehtinen (R-Fla.) and Gerry ConnollyGerry ConnollyDem rep: Trump threatened Mueller by trying to set limits for Russia probe Overnight Cybersecurity: State Department reportedly eliminating cyber office | Senate Intel chief avoids White House during Russia probe | Dem pushes 'ethical hacking' resolution House panel approves backup plan to improve agencies' IT 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.