Ukraine's incumbent President Petro Poroshenko (R) prepares to cast his ballot at a polling station in Kiev, Ukraine, March 31, 2019. Voting for the presidential election in Ukraine kicked off on Sunday with a record number of 39 candidates competing for the presidency. (Xinhua/Ukrainian Presidential Press Service)
Voters participate in the presidential election in Ukraine at a polling station in Kiev, Ukraine, March 31, 2019. Voting for the presidential election in Ukraine kicked off on Sunday with a record number of 39 candidates competing for the presidency. (Xinhua/Sergey)
A voter participates in the presidential election in Ukraine at a polling station in Kiev, Ukraine, March 31, 2019. Voting for the presidential election in Ukraine kicked off on Sunday with a record number of 39 candidates competing for the presidency. (Xinhua/Sergey)