Trump has used executive power to make changes to immigration policy that have affected would-be immigrants, students, entrepreneurs and refugees. We look at the effect of the administration's policies and rhetoric on legal travel and migration to the U.S. Also, Trump meets with other world leaders at the United Nations General Assembly on Monday. But whistleblower reports about an interaction with the leader of Ukraine looms over the event. Host Jeremy Hobson speaks to NPR's Ron Elving about the latest.