LAS VEGAS, NEVADA - NOVEMBER 17:  Democratic presidential candidate, former U.S Vice President Joe Biden speaks during the Nevada Democrats' "First in the West" event at Bellagio Resort & Casino on November 17, 2019 in Las Vegas, Nevada. The Nevada Democratic presidential caucuses is scheduled for February 22, 2020.  (Photo by David Becker/Getty Images)
On the campaign trail, Biden pledged to end gun violence
01:07 - Source: CNN
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