Let’s see here….
Andriy Derkach is a leader of a pro-Putin political party in the Ukraine Parliament.
In December 2019, Derkach met with Trump’s personal attorney Rudy Giuliani in an attempt by Giuliani to dig up illicit slanders against the Bidens. Derkach has also been funneling information of questionable veracity to Sens. Ron Johnson and Charles Grassley.
In August 2020, Trump’s own Director of the United States National Counterintelligence and Security Center, William Evanina, identified Derkach as a leader of Putin’s attempts to influence the US election this year.
In September 2020, Trump’s own Treasury Department slapped sanctions on Derkach for that very reason, saying that “has been an active Russian agent for over a decade”.
I thank the OP for bringing to our attention the attempts by someone close to Trump to solicit illegal foreign influence into the US electoral process. Trump himself probably knew. Giuliani is clearly the criminal.