Assault Weapons

Updated at 1:57 p.m. ET

On the presidential campaign trail in Iowa and on the op-ed page of The New York Times, former Vice President Joe Biden has made the case for going back to a nationwide ban on assault weapons and making it "even stronger."

Some have reacted with quizzical expressions: "Back?" "Stronger?"

Robert Freiberger / Flickr

Update April 6, 2018: The Boulder City Council unanimously approved an ordinance that would ban the sale and possession of so-called assault weapons. The Boulder Daily Camera reports nearly 150 people spoke for and against the proposal during a five-hour-long meeting Thursday evening.