In pulling back from Mr. Trump’s assurance during the campaign that states should be left to decide their own marijuana policies, White House spokesman Sean Spicer made clear that a battle is coming over marijuana policy. It will be a fight that pits a Justice Department headed by a fervent prohibitionist, Attorney General Jeff Sessions, against the eight states — Alaska, California, Colorado, Maine, Massachusetts, Nevada, Oregon and Washington — in which voters have approved ballot measures to legally regulate marijuana, as well as other states likely to legalize marijuana in the near future. (See also: Washington vows to fight feds on any legal marijuana crackdown | Seattle Times: President Trump, pot prohibition is a loser)