 In February 2017, Polis launched the Congressional Cannabis Caucus along with Representatives Don Young, Earl Blumenauer, and Dana Rohrabacher.At the time of his departure from Congress, Polis was one of seven openly gay members of the 113th Congress, and caucused in the LGBT Equality Caucus.Polis pushed for the repeal of the Defense of Marriage Act, and praised the Obama Administration's decision for the Justice Department to no longer defend DOMA, saying that "Section 3 of the law is unconstitutional."