Russian Sanctions as Bargaining Chip

https://www.thedailybeast.com/mueller-ready-to-pounce-on-trumpworld-concessions-to-moscow

“During his investigation Mueller has shown little proclivity for chasing dead ends,” said Paul Pelletier, a former senior Department of Justice official. “His continued focus on the evidence that members of the Trump campaign discussed sanction relief with Russians shows that his evidence of a criminal violation continues to sharpen. This has to come as especially bad news for the President.”