Washington (CNN) Gay marriage is moving forward in the heart of the South on Monday after the Supreme Court denied a request from Alabama for a delay.

The Supreme Court's move makes Alabama the 37th state to allow gay marriage. It comes ahead of a decision expected later this year that could expand marriage rights to gay couples across the country.

"It's a great day in Alabama for everyone who cherishes freedom," said Richard Cohen, President of the Southern Poverty Law Center.

A district court judge struck down Alabama's gay marriage ban in January. The state hoped to block that ruling until the Supreme Court decides the larger marriage case.

In denying Alabama's request for a delay, the Supreme Court set up a clash with state judicial officials. Roy Moore, the controversial Chief Justice of the Alabama Supreme Court, warned probate judges in the state not to issue marriage licenses.

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