He just needs to say that the Paris agreement should have been submitted to the US Senate for ratification as a treaty, that since it has never been ratified by the US Senate the US has never been a party to the agreement. He does not now intend to submit it to the US Senate since he does not consider it to be a treaty the US should join.
That not only announces our rejection of the agreement but also repudiates the idea that we have to go through a prolonged multi-year process to make that withdrawal happen. We were never really “in” it in the first place.
AND, it’s a nice kick in the nuts to Barry and the clowns that pushed this crap on us in the first place.
+1