Ukrainian President Petro Poroshenko, center, speaks to a Canadian officer, as Crimean Tatar leader Mustafa Dzhemilev looks on, at right, during a visit to the military base at the Khmelnitsky, Western Ukraine, Wednesday, March. 20, 2019. The presidential vote in Ukraine is due to take place on March 31. (AP Photo/Mykola Lazarenko, Pool)