The justices are meeting Tuesday to offer the first public indication of where they stand in the dispute over whether states can continue defining marriage as the union of a man and a woman, or whether the Constitution gives gay and lesbian couples the right to marry. The Supreme Court is set to hear historic arguments in cases that could make same-sex marriage the law of the land. 69 of138 70 of138 Demonstrators stand in front of a rainbow flag of the Supreme Court in Washington, Tuesday, April 28, 2015.