Biden says " I could have done better" in debate as his campaign calls attack on him by Castro a "Cheap shot...low blow", Moderate Democrats fear O'Rourke's call for mandatory buybacks of assault-style weapons may hurt push for new gun control law, Trump responds to House Democrats new move toward impeachment: "You don't impeach presidents for doing a good (Great!) job...", Trump campaign, Vice President Pence highlight O'Rourke's debate promise to take away assault weapons, Democrats praise Buttigieg's answer to "Setbacks" question by describing his struggle to announce he is gay, U.S. slaps new sanctions on North Korean hacking groups,
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The Situation Room with Wolf Blitzer and Pamela Brown