The US will step back as mediators between Russia and Ukraine if there is no progress to end the war, the State Department said Tuesday.
"I do have something I can tell you that the Secretary (of State Marco Rubio) said to me about the situation just a short time ago.
"We are now at a time where concrete proposals need to be delivered by the two parties on how to end this conflict. How we proceed from here is a decision that belongs now to the President (Donald Trump). If there is no progress, we will step back as mediators in this process," spokeswoman Tammy Bruce told reporters.
