Several phone calls - starting with John Kerry and then moving on to Joe Biden with President of Ukraine Poreshenko, detailing the arrangements for Poreshenko to fire Ukrainian prosecutor Shokin for a billion dollars in US Aide, Despite that "the fact we don't have any corruption charges, we don't have any information about him doing something wrong." General Prosecutor Shokin was investigating Burisma Holdings - the company who was paying Joe Biden's son ~$80,000 USD a month. Learn more here: nabu-leaks.com