Boston Globe:  “The state’s top federal prosecutor on Monday refused to rule out a crackdown on the voter-authorized marijuana industry, prompting howls from advocates and politicians and moving Massachusetts to the forefront of the battle between the Trump administration and the dozens of states where cannabis is legal.  “I cannot . . . provide assurances that certain categories of participants in the state-level marijuana trade will be immune from federal prosecution,” said US Attorney for Massachusetts Andrew E. Lelling.”