Russian Ambassador Sergey I. Kislyak is back in the limelight, bringing a second Trump official into a delicate situation.
Trumpworld: First there was retired Gen. Michael Flynn, who lied about his phone conversations with Kislyak, and ultimately resigned from his position as National Security Advisor. Second was Attorney General Jeff Sessions, who claimed he hadn't met with any Russians, then admitted he'd twice met with Kislyak. He's also met with Jared Kushner, in addition to two other Trump campaign members.
So who is this man who has gotten so many U.S. officials in trouble?