We must keep talking to Russia: White House's Sullivan

White House national security adviser Jake Sullivan has been engaged in confidential talks with senior Russian officials aimed at lowering the risk of a broader war over Ukraine, a source familiar with the conversations said on Monday. Meanwhile Sullivan, speaking at an event at the Economic Club of New York, did not say he had been engaged himself in direct talks but noted he had said repeatedly that "we have channels to communicate with the Russian Federation at senior levels."