Today's discussions:Former Gov. Chris Christie, former US attorney Chuck Rosenberg, former assistant director of the FBI Frank Figliuzzi, and Vanity Fair's Emily Jane Fox on the fallout inside Trump world after former fixer and attorney Michael Cohen's public testimony against Trump;WaPo's Robert Costa, former undersecretary of State Rick Stengel, NYT's Nick Confessore, and MSNBC contributor Karine Jean-Pierre on the complete breakdown of negotiations in Vietnam between Trump and Kim Jong Un;WaPo's Robert Costa, former undersecretary of State Rick Stengel, NYT's Nick Confessore, and MSNBC contributor Karine Jean-Pierre on Trump's pattern of accepting the denials of dictators, this time it's Kim Jong Un on the death of American Otto Warmbier;Former Gov. Chris Christie, former US attorney Chuck Rosenberg, former assistant director of the FBI Frank Figliuzzi, and Vanity Fair's Emily Jane Fox on the consequences of Cohen's testimony on Trump's children.