The issue focused on medical marijuana policies in Colorado and Washington. Lawmakers there legalized recreational use of the drug for adults over 21. In California, lawmakers approved legislation legalizing medical marijuana by statute last year.

Trump said medical marijuana laws were illegal because federal law prohibited federal enforcement officers from prosecuting anyone who legally grew or administered medical marijuana. Trump also rejected Justice Department guidelines that prosecutors should prosecute only those accused of criminal violations of federal law.

U.S. Attorney General Jeff Sessions took to Twitter Sunday morning to