Many of the Senate’s older, conservative members are still resistant to any path to legalization for marijuana. Senate Majority Leader Mitch McConnell has mocked the House for action on cannabis and was unmoved even by Republican marijuana champion Sen. Cory Gardner of Colorado, a member of the chamber’s leadership, who won’t be around next year. Red states including Oklahoma, South Dakota and Mississippi have now legalized some form of pot — but for the foreseeable future, millions of Americans will be consuming a product the federal government still categorizes as a highly dangerous illegal drug with no medical value.