Top U.S. diplomat in Ukraine describes "alarming" Ukraine pressure campaign Detailed, damning and disturbing — that's how House Democrats described the almost 10-hours of testimony given by Bill Taylor, the top U.S. diplomat in Ukraine, as part of the impeachment inquiry. Taylor laid out in detail his account of how President Trump held up military aid for Ukraine, pushing President Zelensky to investigate Democrats and a company linked to the son of former Vice President Joe Biden. Nancy Cordes reports.