That is a LIE. Ukraine was already investigation Burisma. All President Trump did was tell the Ukraine president that Joe BITE ME was running around bragging about using American taxpayer dollars to get a prosecutor fired and that Ukraine should look into it.
You don't get to lie and change things just because you lose the argument. THESE are the facts, and facts don't care about your feelings.
Biden DID use his office of Vice President to THREATEN the withdrawal of funds if Ukraine didn't fire the prosecutor investigating his son. He admitted it.
Trump did NOT threaten any similar such action in that phone call.
Here is the actual transcript of that call:
https://www.foxnews.com/politics/trumps-ukraine-call-transcript-read-the-document']
Those are the facts. And they don't care about your feelings. You cannot spin the truth. And you have LOST this argument.