Gay marriage has gained full legal recognition in the US, and some have speculated that polyamory may be next to receive the same treatment. According to the Merriam-Webster dictionary, polyamory is defined as

the state or practice of having more than one open romantic relationship at a time

while polygamy is defined as

marriage in which a spouse of either sex may have more than one mate at the same time

Currently, polygamy is outlawed federally and in all 50 states in the US. However, several cities in Massachusetts have passed local ordinances extending the benefits of domestic partnerships to those in polyamorous relationships.

Neuroscientist and fiction author Erik Hoel wrote the following about polyamory in the year 2050 in a blog post published August 25, 2021

Polyamory, the fastest growing cultural movement when it comes to novel forms of relationships, will continue to increase and become more open in the public eye and likely be legalized nation-wide by 2050.

Will polygamy be legal nationwide in the US by 2050?

This question will resolve as Yes if any time between 2021 to 2049 (inclusive), polygamy is legal federally and in all states in the United States. Resolution may be provided by credible media reports or official US government sources.

For the purposes of this question, the legality of polygamy must be indifferent to sex or gender; that is, it should permit both a marriage of one man with multiple women, one woman with multiple men, or any arrangement of legally recognized sexes/genders. Legally-recognized polygamous marriages must allow at least 3 members to be married, though they need not all share equal rights.