marijuanaMarijuana is on the ballot.AP Photo/Ted S. Warren

Marijuana legalization is on the ballot in four states in Tuesday’s midterm elections. 

Michigan and North Dakota are weighing measures to legalize recreational marijuana for all adults, while bright-red Utah and Missouri residents are voting on medical marijuana measures.

Marijuana legalization is sweeping the US: in June, Oklahoma voted to legalize medical marijuana, joining the 31 states that already have medical marijuana laws on the books. A further nine states, including California and Colorado, have legalized the possession and sale of marijuana to all adults over the age of 21. 

It’s also one of the few hot-button topics with widespread support. According to a recent poll from Pew Research, 62% of Americans support legalizing recreational marijuana, including 74% of millennials. 

And 2018 has been a banner year for marijuana legalization in North America. In October, Canada legalized marijuana federally, becoming the first Group of Seven country to do so. Mexico’s Supreme Court ruled in October that marijuana prohibition was unconstitutional, paving the way for the country’s new leader — Andrés Manuel López Obrador — to follow Canada’s lead.

Here are all the states voting on marijuana on Tuesday: