https://www.nybooks.com/daily/2019/09/25/trump-giuliani-and-manafort-the-ukraine-scheme/
The effort by President Trump to pressure the government of Ukraine to investigate former Vice President Joe Biden and his son had its origins in an earlier endeavor to obtain information that might provide a pretext and political cover for the president to pardon his former campaign chairman, Paul Manafort, according to previously undisclosed records.
These records indicate that attorneys representing Trump and Manafort respectively had at least nine conversations relating to this effort, beginning in the early days of the Trump administration, and lasting until as recently as May of this year. Through these deliberations carried on by his attorneys, Manafort exhorted the White House to press Ukrainian officials to investigate and discredit individuals, both in the US and in Ukraine, who he believed had published damning information about his political consulting work in the Ukraine. A person who participated in the joint defense agreement between President Trump and others under investigation by Special Counsel Robert Mueller, including Manafort, allowed me to review extensive handwritten notes that memorialized conversations relating to Manafort and Ukraine between Manaforts and Trumps legal teams, including Trumps personal attorney, Rudy Giuliani.