One of the most interesting disclosures from the Flynn investigation was a meeting in New York with Ukrainian politician Andrey Artemenko, Trump lawyer Michael Cohen, and Trump business associate Felix Sater. Shortly before Flynn resigned, these figures were working on a deal in which sanctions against Russia would be lifted in exchange for Russia leasing Crimea for 100 years while recognizing Ukrainian sovereignty over that region. Cohen is tied to Ukraine in other ways. He was introduced to Trump by his father in law, Fima Shusterman, a naturalized American citizen from Ukraine. Cohen also ran a taxi medallion business with his business partner, the “taxi king” Simon Garber, who was born in Ukraine.
United States attorneys for the Southern District of New York opposed leniency for Cohen because they believe he withheld evidence of criminal conduct. Notably, the Southern District of New York was not investigating the Russian conspiracy. It was investigating the myriad criminal dealings of Cohen, including the taxi medallion business set up by Shusterman.
https://thehill.com/opinion/judiciary/430933-could-robert-mueller-actually-be-investigating-ukrainian-collusion
Manafort is tied into U1
Why did Kushner recommend him to Trump?