President Donald Trump speaks during a ceremony for new Secretary of Defense Mark Esper at the Pentagon. Picture: AP

Ukraine has unwittingly become embroiled in a political battle in Washington between U.S. President Donald Trump and congressional Democrats who could announce formal impeachment charges against him within weeks.

Democrats launched an inquiry in September into allegations Trump abused his power to pressure Ukraine President Volodymyr Zelenskiy to investigate former Vice President Joe Biden, a Democratic possible rival in the 2020 presidential race.

Trump calls the inquiry a partisan “witch hunt” and neither he nor his lawyers have agreed to appear in an inquiry hearing on Wednesday.

WHAT DOES TRUMP WANT FROM UKRAINE?