The finding comes just months after the Obama administration announced that it would no longer defend the Defense of Marriage Act (DOMA) -- the law that prohibits the federal government from recognizing same sex marriages -- in court. Republicans, including some potential presidential candidates like Mike Huckabee, decried that decision, saying Obama was going against public opinion. But recent polls show Americans are steadily growing more supportive of legal recognition for same sex couples.
In addition to the CNN and Washington Post/ABC News surveys, Pew has also shown support for DOMA eroding in the past few years. In a 2009 Pew poll, 54% of adults said same sex marriage should be illegal, versus only 37% who said it should be legal. One month ago, that split had shrunk to 46% opposed and 45% in favor.
Republicans have hired Paul Clement, a Bush-era Solicitor General to defend the law on behalf of Congress.
The CNN poll was conducted April 9-10 among 824 adults nationwide. It has a margin of error of 3.5%.