‘Liars!’: Trump Fires Off Post-Christmas Tweetstorm Over Impeachment Impasse

The first House-passed article of impeachment charged Trump with abusing his power by pushing Ukraine to probe former Vice President Joe Biden, his son Hunter and Democrats while withholding nearly $400 million in military aid to the country, as well as an official White House visit for Ukrainian President Volodymyr Zelenskiy. The second article charged Trump with obstructing Congress' investigation into those efforts.