At what could be a crossroads in relations between Moscow and Washington, Russia has appointed a new ambassador to the United States. Here’s a look at Aleksandr Darchiyev, who has spent over a decade at the Washington embassy and has lashed out at the country where he'll now be Putin's chief envoy.

President Donald Trump raised the prospect of imposing large-scale U.S. sanctions on Russia on Friday, days after pausing aid and intelligence sharing to Ukraine, and called on both countries to get on with negotiating a peace deal.