In the summer of 2015, a landmark case called Obergefell v. Hodges came to a close. The Supreme Court was overseeing the case, and they ruled on June 26 that same-sex marriage couldn't be banned on the state level. This led to a lot of changes to marriage law around the country as states that still made it illegal had to update their laws.
However, Minnesota wasn't among their number. This wasn't because there was any resistance to the federal ruling, but simply because Minnesota had been leading the way in same-sex marriage laws for years. These unions had been made legal in the state back on Aug. 1, 2013. The federal law simply fell in line with what Minnesota was already doing.
There had been a few other related issues around the same time. For example, in the election in November 2012, an amendment to the constitution had been proposed, saying only men and women could get married. It did not pass.
The following summer, the Supreme Court did away with the Defense of Marriage Act. It said that same-sex marriage was illegal on the federal level, but it was voted down. Just a little over a month later, Minnesota went ahead and made it legal within the state.
Same-sex marriage rights have massively expanded all over the United States, and it's important for those in Minnesota to know how those rights have changed, even if they technically changed years before 2015. The new rights impact far more than just marriage, stretching into divorce cases, child custody cases and more.
Source: Minnesota Legislature, "Same-Sex Marriage in Minnesota," accessed Oct. 15, 2016