Members of Congress from states with legal pot urged their colleagues Thursday not to stand in the way of expanded legalization and to approve measures that would make it easier for marijuana businesses to operate.

Voters in Alaska, Oregon and the District of Columbia approved ballot initiatives to legalize marijuana possession last week. Those places would join Colorado and Washington state, which already have legal pot.

Amid close midterm elections around the country, “there was one clear winner: ending our failed prohibition of marijuana and instead legalizing, regulating and taxing adult use,” Democratic Rep. Earl Blumenauer of Oregon said at a news conference with three House colleagues.

Read more: Cannabis in Congress: Marijuana-friendly states teaming up | Associated Press