Democratic Party February 19, 2020 10:31 pm Key Moments from the Ninth Democratic Debate Six presidential candidates faced off at the Democratic Debate in Las Vegas, Nev. on Wednesday night. Here are the key moments you may have missed. US & World Videos 2:49 Lady Gaga teases her ‘authentic' version of Harley Quinn in ‘Joker' sequel 2:10 Cassie breaks silence after Sean ‘Diddy' Combs apologizes following 2016 assault video 2:53 Breaking down the DOJ lawsuit against Ticketmaster and Live Nation 10:52 Florida High School helps teens recover from addiction 0:57 ‘Seinfeld' star Michael Richards reveals prostate cancer diagnosis