Michael Flynn was exposed to potential blackmail by Russia, the former deputy attorney general has testified.

Sally Yates told the Senate judiciary committee that Mr Flynn, the former national security adviser, had left himself "compromised" by having a conversation with the Russian ambassador, and then lying to the vice president, Mike Pence, about it.

She said that the Russians knew the conversation with Sergey Kislyak had taken place, but the White House did not - meaning that Mr Flynn could be "essentially blackmailed by the Russians."