Cautious Russia weighs Ukraine ceasefire plan as U.S. tries to seal a deal
U.S. Secretary of State Marco Rubio said there was hope for a positive response and that a negative one would say a lot about the Kremlin's true intentions.
Tomas Kauer - News Moderator 
U.S. Secretary of State Marco Rubio said there was hope for a positive response and that a negative one would say a lot about the Kremlin's true intentions.
