I think he can do the same after 2 weeks or even after 2 months as well.
It can be something along the lines - "we back off a tad and you lift some of your sanctions". That's why I wonder how it will go a year from now. Now everyone is kneejerking, but in the end they will all sit down behind the curtains and have bargaining begin.
Now of course this is very simplistic - but in the last decade you seen wilder things go from 0 to 100 and back to 0.