There were announcements last weekend that the US would impose further sanctions this week on Russians said to have assisted Syria with chemical weapons (see eg 15 April 2018 statement by the US ambassador to the UN, Nikki Haley). However, yesterday (16 April) the White House press briefing said new measures were currently being evaluated, but that there was “nothing to announce right now” and reports suggest that President Trump has told national security advisers that he is uncomfortable imposing the planned new sanctions without another “triggering event” by Russia.