true, marriage is not a federal issue. States create marriage laws.
Polygamy was a federal issue. Utah was not allowed to join the union until they banned polygamy.
Liberals claimed we did not need a federal marriage amendment because we had a federal DOMA and state DOMAs and state amendments. Well the Supremes overturned the federal DOMA and federal courts have been overturning state DOMAs and amendments. Just because a few states have a temporary ok to keep their bans does not negate the states where bans have been overturned and whose appeal to the Supremes was declined.
We need a federal marriage amendment.
As it stood before this craziness, the differences between state marriage laws were very minor having to do with age and parental consent.