Gay Marriage should be legal and recognised in the whole country not just in certain states of the US.
Gay couples do not have any rights to visit a loved one for example if they are in hospital as they won't be classified as a couple the way government sees it just as room mates.
For example Tom Bridegroom from Indiana passed away and left his boyfriend of 6 years Shane Bitney alone in this world and because they couldn't marry as they lived in Los Angeles was denied to see Tom at the hospital and they had a business together so he lost everything.
So please stop denying gay couples the right to marry in all the states of the US and not just the current ones.
Also not to forget please sort the issue out with immigration for gay couples to stay in US if they marry and not deported.