Attorneys for gay couples and the state of Florida are set to square off in a lawsuit today that challenges Florida's constitutional ban on same-sex marriage.

This court date comes on the heels of back-to-back marriage equality victories in Oregon, Pennsylvania, and Tuesday in Kentucky.

The suit filed on behalf of six couples and Equality Florida Institute contends the gay marriage ban added by voters to the state constitution is discriminatory and violates equal protection guarantees.

If Miami-Dade Circuit Judge Sarah Zabel rules in favor of the couples, that decision could impact couples across the state.

But Attorney General Pam Bondi's office argues a single judge should not strike down an amendment that passed in 2008.  Bondi's attorneys said the U.S. Supreme Court has left marriage definitions up to the states to decide.

Zabel is being asked strike down the same-sex marriage ban before a trial. She could rule Wednesday, but an appeal has already been promised.

In just the past few months, marriage equality bans have been struck down in nine states: Utah, Virginia, Texas, Oklahoma, Arkansas, Idaho, Oregon, Pennsylvania and Wisconsin.

Same-sex couples in 18 states and the District of Columbia currently have the freedom to marry.

A federal judge ruled Tuesday Kentucky's gay marriage ban violated the Equal Protection Clause of the U.S. Constitution. But the lead plaintiff in the Kentucky case acknowledges he will probably have to wait until the U.S. Supreme Court weighs in on the issue before licenses for same-sex couples will be issued in Kentucky.