Justices will hear arguments focusing on two questions: can states ban same-sex marriage and do states have to recognize lawful marriages from other states?
The cases being heard Tuesday come from Kentucky, Tennessee, Michigan and Ohio; all where lower courts upheld same-sex marriage bans.
The Family Foundation of Kentucky hopes the high court will protect a state’s decision to keep marriage as one man and one woman.
“This would be a huge usurpation of the state’s rights if the federal government decided, through its Supreme Court, to define marriage the way it wanted to rather than allow the states to do it how they wanted to,” says Kent Ostrander with the Family Foundation of Kentucky.
Lexington Fairness wants equal protection under the law for all couples.
“We’re not attempting to undermine religion, we’re not attempted to undermine the definition of marriage,” says Josh Mers with Lexington Fairness. “Marriage has been an evolving part of our culture from since the beginning of time.”
Tuesday arguments are expected to last several hours.
A decision from the justices isn’t expected until sometime in June.
Kentucky is just one of 13 states banning same-sex marriage.