The Marijuana Policy Project is gearing up for a 2016 campaign to tax and regulate marijuana in another Southwestern state, Nevada. Although a recent poll found that a majority of Nevada residents (54%) support legalizing marijuana for adults and 39% voted in favor of legalization on a 2002 ballot, MPP’s communications director Mason Tvert said that there are several reasons to wait until the November 2016 election to launch a petition. By 2016, Tvert said, the campaign will almost certainly have…