embassy in ukraine tells in his own words his version of events surrounding the president's dealings with the ukrainian counterpart, a relationship that was the spark igniting the impeachment probe. we have fox team coverage tonight. john roberts at the white house with the furor over the president's use of lynching. we start off with chief intelligence correspondent catherine herridge on capitol hill and some key testimony for impeachment advocates. good evening, catherine. >> that's right, bret. good evening. the top u.s. diplomat to ukraine came to capitol hill under subpoena after his text messages revealed allegations of military aid for political favors and accusation the trump administration strongly denies. >> sources familiar with the closed door session tell fox news that william taylor told congressional investigators they were, quote, two channels for policy making on ukraine, quote: one regular and one highly irregular. taylor who described himself as a career diplomat said the regular channel went through traditional state department avenues. and the irregular channel went through the president's