The following comes from a leaked phone call  between then-Vice President Joseph Biden and then-Ukrainian President Petro Poroshenko, that allegedly took place on March 22, 2016.
Joe, I have a second positive news for you. Yesterday, I met with the General Prosecutor Shokin, and despite of the fact that we didn’t have any corruption charges, we don’t have any information about him doing something wrong, I specially asked him… to resign.”… “And this is my second step for keeping my promises.Petro Poroshenko, President of Ukraine
But congratulations on installing the new Prosecutor General, it’s going to be critical for him to work quickly to repair the damage Shokin did.
…I’m a man of my word, and now that the new prosecutor General is in place, we’re ready to move forward to signing that new 1-billion-dollar loan guarantee.Joe Biden, then-Vice President of the United States
Noting that Joe Biden also late said on a live broadcast on January 23, 2018 :
I said ‘I’m telling you you’re not going to get the billion dollars’, I said ‘you’re not getting the billion’, I’m going to be leaving here I think it was what, 6 hours, look I said ‘I’m leaving in 6 hours, if the prosecutors not fired you’re not getting your money.Joe Biden, then-former Vice President of the United States