In this Tuesday, Dec. 23, 2014 photo, Edgar Antillon, one of the organizers of an effort to have a ballot measure placed before voters in the 2016 November election to allow marijuana users to carry concealed firearms, stands outside the State Capitol, in downtown Denver. The measure would change state law to prevent sheriffs from using marijuana use as a reason to deny a concealed carry permit to an applicant. (AP Photo/David Zalubowski)

In this Tuesday, Dec. 23, 2014 photo, Edgar Antillon, one of the organizers of an effort to have a ballot measure placed before voters in the 2016 November election to allow marijuana users to carry concealed firearms, stands outside the State Capitol, in downtown Denver. The measure would change state law to prevent sheriffs from using marijuana use as a reason to deny a concealed carry permit to an applicant. (AP Photo/David Zalubowski)