Civil unions are available for that, and I am all for them granting the same rights of marriage. So why must they trample on marriage specifically? Why don't they just get those rights with a civil union? Why should it be called the same thing, when there are such huge differences? Some bigotry/hatred of the Catholic Church perhaps?
There's nothing in the Constitution that says the definition of marriage should be changed.
And how hypocrital can you get? Obama blatantly violated the Constitution all over the place, and you are silent. But you now run for the protection of the Constitution when you think it will help you. Leave it alone if you are not willing to stand up for it all the time.