Answer The Supreme Court, in 2015, made a significant decision regarding same-sex marriage bans. They ruled that these bans were unconstitutional, meaning they violated the United States Constitution. The reasoning behind this decision was based on several constitutional clauses, including the Reserved Powers Clause, Full Faith and Credit Clause, 14th Amendment, and Privileges and Immunities Clause. This landmark ruling recognized the rights of same-sex couples to marry and enjoy the same legal protections and benefits as opposite-sex couples.