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First witness in impeachment probe on Capitol Hill

15:00

President Trump is as defiant as ever over the impeachment inquiry, as Congress interviews former U.S. Special Envoy Kurt Volker. Ali Velshi and Stephanie Ruhle break down who Volker is and how the president is suggesting another foreign country help in his own agenda. Weighing in: NBC’s Kelly O’Donnell, former Deputy Assistant Secretary of State for East Asian Affairs Michael Fuchs, NBC’s Geoff Bennett, and impeachment attorney Ross Garber.