Marijuana legalization activists returned to the office of Alabama Sen. Jeff Sessions on Thursday, successfully sneaking cannabis past a security checkpoint so they could offer it for use by the attorney general nominee or his staff. Sessions communications director Chris Jackson deftly handled the two dozen office visitors, listening politely to stories about medical use of the plant and arguments against prohibition, but he declined to accept a sample of the drug that is increasingly legalized or decriminalized at the state level but remains illegal in the eyes of federal authorities. Although at least two activists brought weed, with one...