In the first round of its presidential election on Sunday, Ukrainian voters will have a choice between its current president, a former prime minister and an unlikely third candidate -- a comedian best known for a TV show where he plays a man who accidentally becomes president. It is the comedian, Volodymyr Zelenskiy, who is currently favorite. With no candidate expected to receive more than 50 percent in the first round of the vote, polls show Zelenskiy has a strong chance to win the presidency in a second round next month. Zlenskiy, 41, is an actor and stand-up comic who...