No Congress ever has seen fit to amend the Constitution to address any issue related to marriage. No Constitutional Amendment was needed to ban polygamy or bigamy nor was a Constitutional Amendment needed to set a uniform age of majority to ban child marriages.

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Machiavelli taught me it was better to be feared than loved. Because if you are loved they sense you might be weak. I am a man of the people and help them but it is important to do so through strength.