From Iran and Cuba to Ukraine and NATO, President Trump's UN visit touched nearly every major foreign policy challenge facing the United States. Francesca Chambers, USA TODAY White House correspondent, examines the biggest moment and what to watch as Trump heads into a high-stakes meeting with China's leader.Let us know what you think of this episode by sending an email to [email protected]. Episode transcript available here. See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.