Statehouse Republicans are again proposing a change in the Iowa constitution to ban gay marriage.
Thirty-five House Republicans signed a resolution on the issue Tuesday. Senate Republicans filed an identical bill last week.
The measure would begin the process of amending the state constitution to permit marriage only between a man and a woman. The resolution would need to be passed by lawmakers then approved by the legislature elected in 2014 before voters see it.
Passage is unlikely because of Democratic opposition in the Iowa Senate.
Gay marriage has been legal in Iowa since a unanimous state Supreme Court decision in 2009, that ruled a ban on gay marriage was unconstitutional.