Historic hearings on marijuana’s status under federal law will begin in earnest sometime in mid-January, an administrative law judge for the U.S. Drug Enforcement Administration said during a procedural session Monday. At that time, hearings will be held “Tuesday through Thursday … for as long as it takes,” said John Mulrooney II, the DEA’s chief administrative law judge. There’s still no exact date when Mulrooney might rule on moving marijuana from Schedule 1 to Schedule…