The ballot measures passed in recent years, proponents and opponents say, have provided both sides with valuable lessons and new tools they will use to sway voters this year.

“What we have now on our side is actual experience in states like Colorado and Washington,” said Aaron Smith, executive director of the National Cannabis Industry Association, based in Denver. “Now voters can actually see how these programs are working in these states. Before, there were prophecies of doom and gloom.”

Read more: http://thehill.com/homenews/campaign/290258-pot-proponents-see-momentum