Obama says he hopes a truce will give space to reach a political solution . The U.S. and Russia have been at odds over the crisis in Ukraine since last November when pro-Russian separatists seized government buildings in eastern Ukraine. Ukrainians should be able to `` determine their own destiny , '' Obama adds . U.S. puts Ukrainians responsible for crackdown on visa ban list .
Obama says he hopes a truce will give space to reach a political solution . He pushes for a unity government to pave the way for fair and free elections . Ukrainians should be able to `` determine their own destiny , '' Obama adds . U.S. puts Ukrainians responsible for crackdown on visa ban list .