White House Blocks Key Witness From Testifying In Impeachment Inquiry : The NPR Politics Podcast The Trump administration has blocked Gordon Sondland, President Trump's ambassador to the European Union, from testifying before Congress on Tuesday. Sondland has been a key figure in the widening Ukraine scandal. This episode: political correspondent Scott Detrow, Congressional correspondent Susan Davis, and White House Franco Ordoñez. Email the show at firstname.lastname@example.org. Find and support your local public radio station at npr.org/stations.