The government, federal or state, has no business in defining what a marriage is or is not.
It's only concern should be identifying those who wish to establish themselves as a family household for the purposes of financial, medical, child guardianship matters.
Marriage was established as a religious sacrament long before the US or state governments were formed.
Government by dictating what is and is not a marriage, has established itself as the religious authority on the matter. This clearly violates our first amendment rights : "Congress shall make no law respecting an establishment of religion".
Do not let the federal or state governments dictate what a marriage is. That is the right of the people to decide for themselves.
If a group of individuals want to establish themselves as a family household, then the governments should legally recognize that and equally apply the laws to all households when it comes to taxes, inheritance, insurance and any other financial, medical, and child guardianship matters.
Leave it to people to call themselves married, unioned, joined, or what ever else their religion or philosophy calls it.
Marriage will continue to be an issue as long as the government stays in the religion business despite anything the Supreme Court rules on the matter.