Ukrainian President Petro Poroshenko, left, and Ukrainian presidential candidate and popular comedian Volodymyr Zelenskiy, right, argue during their debates at the Olympic stadium in Kiev, Ukraine, Friday, April 19, 2019. A comedian leading Ukraine???s presidential race and the incumbent faced off in a debate at the nation???s largest sports arena Friday, fiercely trading accusations two days before the runoff. (Mykhailo Markiv, Ukrainian Presidential Press Service via AP)