Several senators, all of whom are eyeing 2020 bids for the Democratic nominee, gathered in Washington for the "We the People" summit, organized by groups such as Planned Parenthood and MoveOn.org. CBS News political correspondent Ed O'Keefe joins CBSN to discuss what the summit is about, who organized it, why the senators attended -- and what they had it to say about Mr. Trump's recent meeting with Kim Jong Un.
