As the post's title suggest, I don't understand what the problem is here. People are coming to Iowa from out of state. That's tourism, and most states appreciate out-of-staters coming in and spending money in your state. What are these 'harmful effects' you speak of, Rep. King? Am I missing something here?
If you don't think gay marriage should happen, then say so. If that's the case, you should want all gay marriages to be banned, not just ones coming from out of state. This seems like a desperate ploy of a conservative who knows he's lost the battle on gay marriage, but still wants to stifle as many as he possibly can, regardless of the rationale behind his attacks.