New CNN Poll: Biden lead slips to five points after debates as Harris and Warren surge, while Sanders drops to fourth; NYT: White House weighs North Korea nuclear freeze after Trump's surprise meeting with Kim Jong Un; Trump takes questions from reporters

New CNN Poll: Support for Biden down 10 points as Harris moves up 9 points into second place; Iran breaks low-grade enriched uranium limits set under 2015 Nuclear deal; Trump talking with reporters now in Oval Office; Trump: Iran is "playing with fire"; Trump defends citizenship question he wants on census; Dems defend Sen. Harris after Trump Jr. retweets then takes down post about her racial heritage; Trump: Big difference between a citizen and "an illegal"; Trump: Hispanics "love what I'm doing" at the border; Whistleblower tells Congress Secretary of State Pompeo used security guards for personal errands; Whistleblower alleges Pompeo security agents delivered food, picked up family dog from groomer

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