Ukraine leader debates alone as vote frontrunner a no-show

Ukraine's incumbent leader on Sunday warned the country's future was in danger as he failed to lure out a comedian tipped to become the next president into a debate before a high-stakes run-off vote.The actor Volodymyr Zelensky's predictable no-show prompted President Petro Poroshenko to stage a one-man debate at Kiev's Olympic Stadium as several thousand supporters flooded a nearby square.Outside the sports arena that seats 70,000 the Ukrainian leader's supporters chanted "Poroshenko" and urged