The Minnesota State Fair always features a buffet of politics, and this year fairgoers have a new issue to chew on: a constitutional vote on marriage.

Voters will decide in November of 2012 whether Minnesota should add a constitutional amendment that would prohibit same-sex marriage.

There's still one more state fair before the 2012 elections, but proponents and opponents of the amendment are both preparing to battle for votes -- and the fairgrounds is the site of an early skirmish.