No, marriage between a man and a woman is a fundamental right recognised in American jurisprudence to enhance the family unit and thus the nation as a whole. The last time the Feds took marriage out of the government during the Great Society by substituting the state for marriage, they destroyed generations of inner city families and we are reaping the whirlwind to this day.
A lot of people in general and especially on FR get SO worked up over gay 'marriage', and I honestly can't see why, when I think divorce and single parent (or no parent) families are a much bigger problem.