More than 30 U.S. states have filed briefs asking the U.S. Supreme Court to rule on same-sex marriage.
Massachusetts and 14 other states where same-sex marriage is legal filed a brief Thursday asking the justices to overturn other states' bans on gay marriage.
Colorado and 16 other states that have banned same-sex marriage filed a separate brief asking the court to rule one way or the other to clear up a "morass" of lawsuits. Their brief doesn't specifically ask the court to uphold their bans.
Same-sex marriage is legal in 19 out of 50 U.S. states and Washington, D.C. Bans that have been overturned in many states continue to make their way through the courts. Since last year, the vast majority of federal rulings have declared same-sex marriage bans unconstitutional.