Late January - Giuliani meets with Ukraine's Prosecutor General Lutsenko.
March 6 - Trump admin says they are publicly weighing more aid to Ukraine.
March 20 - Lutsenko confirms on the record he opened an investigation into the DNC.
Early April - Lutsenko orders a halt on cooperation with Mueller.
Late November 2017 - Giuliani flies to Ukraine and meets with senior Ukrainian government officials.
December 22 - Trump announces the sale of Javelin missiles to Ukraine.
sometime in 2017 - Ukraine lets Kilimnik escape to Russia.