Acting White House Chief of Staff Mick Mulvaney's stunning admission supports a key allegation in the House impeachment effort
He did what no politician had done before -- a more than 12-hour press conference
He urged ministers to also resign, despite Ukrainian law obliging the government to do so only after parliamentary elections.
The Ukrainian president has strong powers over defence, security and foreign policy but will need parliament backing to push through reforms.
Despite concerns about Zelensky's vague platform, supporters insist only a total outsider can clean up Ukraine's murky politics.
The frontrunner in Ukraine's presidential election, Volodymyr Zelensky, has no political experience beyond playing the head of state in a TV show