Facing impeachment proceedings after asking Ukraine to probe his chief political rival, US president tells reporters Beijing should do the same

US vice president, a key intermediary between White House and Ukraine, has until now rarely been drawn into Trump controversies

As Democratic leaders put White House on notice that wide-ranging subpoena coming for info on Trump’s Ukraine actions, president goes on defensive with name-calling, expletives

US president’s attacks come amid escalating impeachment fight over his effort to pressure the government of Ukraine to investigate Biden

House leaders warn US administration not to intimidate potential witnesses in impeachment probe, announce plans to subpoena White House over Ukraine scandal

Justice Department confirms Trump appealed to multiple foreign leaders to help his attorney general get info on Mueller investigation's origins

Russian leader defends conduct of US president amid impeachment probe, jokes that Moscow will 'absolutely' meddle in 2020 US elections

US secretary of state doesn't specify whether he thought content of phone conversation was inappropriate

Lawmakers are trying to obtain testimony from informer, but are concerned about safety after US president calls actions treasonous

Senior State Department official says US secretary of state was 'among administration officials' on July 25 call; Democrats subpoena Giuliani to turn over Ukraine-related documents