Published on May 20, 2020 Leaked phone conversations between Joe Biden and then-Ukraine President Petro Poroshenko have been made public by a Ukrainian lawmaker. Edited recordings of the calls were played at a news conference Tuesday in Kiev by Andriy Derkach, who has claimed he has proof showing that Burisma Holdings, the Ukrainian natural gas company that employed Biden’s son Hunter Biden, paid then-Vice President Joe Biden $900,000 in lobbying fees.