It needs to be fought, but the praticality must be understood.
If you know history, you know the mormon pologamy was addressed in the courts, not through a constitutional amendment. The best way...the most practical...is through the courts. Most negative changes come through there, and vice-versa.
Actually not. The Morrill Anti-Bigamy Act was signed into law on July 8, 1862 by President Abraham Lincoln. The act banned plural marriage and limited church and non-profit ownership in any territory of the United States to $50,000.
It was upheld in the courts 20 years later.