There are a number of questions be asked about some senior Democrats when it comes to Ukraine, and the following are some of those:-
Clinton
When the IMF made billions available to Ukraine the money was laundered off and not used properly, Of the money about $29 million was donated to the Clinton Foundation by the Ukraine billionaire owner of the bank who handled the IMF funding, It is clear that there are more to this than meets the eye, Why should the Clinton Foundation get a donations like that from a country relying on foreign aid, The Ukraine is investigating the bank now and the owner is trying to wind up the affairs of the bank.
Podesta
He was involved in partnership with Manaford in activities in Ukraine. This was mentioned in the Mueller report, but while the FBI went for Manaford - they ignored his partners. When the tap ran dry in 2012 and knowing the danger of being exposed Podesta switched his activities to Russia, Russian company invested $35 million on a company owed by Podesta. In the end Podesta got a donation of 75 000 shares in a Russian state-owned company. Crooked as hell that one.
Pelosi
Pelosi's son was active in Ukraine as well - and Pelosi herself made a video suppo rting the activities in Ukraine.
Schiff
There is a long history of Schiff's in the Ukraine.