Voters in Missouri approved Amendment 2 on Tuesday, making it the 31st state in the country to adopt a medical marijuana law.
Amendment 2 was passing 64 to 36 percent with 49 percent of precincts reporting, according to the Marijuana Police Project.
The amendment was one of three put before voters. Amendment 2 makes growing, selling and using medical marijuana legal in the state.
Amendment 2 would tax marijuana at 4 percent.