By Jonathan Landay and Arshad Mohammed WASHINGTON (Reuters) - Russia's invasion of Ukraine has made John Sullivan's tough job as U.S. envoy to Moscow .
Russia's invasion of Ukraine has made John Sullivan's tough job as US envoy to Moscow even harder as he grapples with the Kremlin's nuclear saber-rattling and threats to sever relations while keeping his embassy running on one-tenth the normal staff.
WASHINGTON (Reuters) - Russia's invasion of Ukraine has made John Sullivan's tough job as U.S. envoy to Moscow even harder as he grapples with the Kremlin's nuclear saber-rattling and threats to sever relations while keeping his embassy running on one-tenth the normal staff.