In this April 28, 2015, file photo, demonstrators stand in front of a rainbow flag of the Supreme Court in Washington, as the court was set to hear historic arguments in cases that could make same-sex marriage the law of the land. Gay and lesbian couples could face legal chaos if the Supreme Court rules against same-sex marriage in the next few weeks. Same-sex weddings could come to a halt in many states, depending on a confusing mix of lower-court decisions and the sometimes-contradictory views of state and local officials. Among the 36 states in which same-sex couples can now marry are 20 in which federal judges invoked the Constitution to strike down marriage bans. (AP Photo/Jose Luis Magana, File)

WASHINGTON (AP) ai??i?? The Supreme Court declared Friday that same-sex couples have a right to marry anywhere in the United States.

Gay and lesbian couples already could marry in 36 states and the District of Columbia. The court’s 5-4 ruling means the remaining 14 states, in the South and Midwest, will have to stop enforcing their bans on same-sex marriage.

The outcome is the culmination of two decades of Supreme Court litigation over marriage, and gay rights generally.

Justice Anthony Kennedy wrote the majority opinion, just as he did in the court’s previous three major gay rights cases dating back to 1996. It came on the anniversary of two of those earlier decisions.

“No union is more profound than marriage,” Kennedy wrote, joined by the court’s four more liberal justices.

The four dissenting justices each filed a separate opinion explaining their views.

“But this court is not a legislature. Whether same-sex marriage is a good idea should be of no concern to us,” Chief Justice John Roberts wrote in dissent. Roberts read a summary of his dissent from the bench, the first time he has done so in nearly 10 years as chief justice.

Justice Antonin Scalia said he is not concerned so much about same-sex marriage, but about “this court’s threat to American democracy.” Justices Samuel Alito and Clarence Thomas also dissented.

The ruling will not take effect immediately because the court gives the losing side roughly three weeks to ask for reconsideration. But some state officials and county clerks might decide there is little risk in issuing marriage licenses to same-sex couples.

The cases before the court involved laws from Kentucky, Michigan, Ohio and Tennessee that define marriage as the union of a man and a woman. Those states have not allowed same-sex couples to marry within their borders and they also have refused to recognize valid marriages from elsewhere.

Just two years ago, the Supreme Court struck down part of the federal anti-gay marriage law that denied a range of government benefits to legally married same-sex couples.

The decision in United States v. Windsor did not address the validity of state marriage bans, but courts across the country, with few exceptions, said its logic compelled them to invalidate state laws that prohibited gay and lesbian couples from marrying.

The number of states allowing same-sex marriage has grown rapidly. As recently as October, just over one-third of the states permitted same-sex marriage.

There are an estimated 390,000 married same-sex couples in the United States, according to UCLA’s Williams Institute, which tracks the demographics of gay and lesbian Americans. Another 70,000 couples living in states that do not currently permit them to wed would get married in the next three years, the institute says. Roughly 1 million same-sex couples, married and unmarried, live together in the United States, the institute says.

The Obama administration backed the right of same-sex couples to marry. 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