It isn't like Trump has much choice in the matter.  His current record for legislative success is now zero for five?  Maybe one for the second House attempt which went nowhere.  The sanctions passed both chambers with plenty of extra votes to overturn a veto.  And even if it wasn't its questionable if Trump would even want to at this point after he's blown all his political capital on healthcare.
I'm also curious how congressional Republicans are reacting to Spicer's, Priebus', etc. exit from the WH.  It seems like Trump is completing the circle of those who fill his echo chamber with loyal yes-men.  Trump's personal attempts at wooing Republican lawmakers (and indirectly through Pence) to his side have repeatedly failed and now he's resorting to naked threats (through Zinke for example).  If this sanction hadn't started days before I would have thought this was an opening shot across Trump's bow.