with the north koreans. the commander-in-chief tweeting "it hasn't worked out. at least i know china tried." >> bret: thank you. more analysis in a moment. president trump leaves tomorrow for the g20 summit in hamburg, germany, where he will meet with his counterparts from china and russia. kristin fisher has a preview from warsaw, poland. >> president trump lands of the polish capital wednesday where he will find an audience that's open to his brand of politics. >> poland is a country with government like minded with trump. conservative that has favored restrictive immigration policies. >> also a country that exists in the shadow of russian aggression and has been concerned that the trump administration isn't fully committed to helping nato. >> if nato countries made their contributions, then nato would be even stronger than it is today. >> the president admonished nato