Donald Trump had promised to enact "concealed carry reciprocity," which would allow gun owners' permits to be valid in all states.

Twenty-nine states already allow some form of concealed carry reciprocity, including some that only honor concealed carry permits from out-of-state gun owners if their state reciprocates.

Criteria included ease of acquiring a concealed carry permit, costs associated with licensure, training hours required and reciprocity with other states.

DENVER — Winter-driving season has arrived in Colorado, and there are new rules ... over 16,000 pounds must carry four snow chains or adequate alternate traction devices on their trucks if ...