The impeached President has to meet a noon deadline to submit his written defense.
“This is a brazen and unlawful attempt to overturn the results of the 2016 election and interfere with the 2020 election - now just months away,” Trump’s lawyers argued in a six-page initial response to the charges.
According to Trump's legal team, he was acting within his constitutional authority to press President of Ukraine Volodymyr Zelenskiy to investigate ex-Vice President Joe Biden and his son Hunter as part of "anti-corruption drive".
Lev Parnas, Rudy Giuliani's associate, provided text messages and hand-written notes that add more details about the push for an investigation into Bidens.
According to the note, Parnas's chief objective in Ukraine was for its president to announce a criminal probe into Democratic frontrunner Joe Biden and his son.