Well, since they are involved in the whole mess, that didn’t seem likely....so the president himself has no power to do anything about such a twisted mess?
Of course he does. But, he may have been playing a long game here, and not want to inject himself directly into the process unless absolutely necessary. For example, if Grassley raises enough of a din, or Gowdy, about this agreement, DOJ may be forced to take a position. And, taking the position that the agreement is valid (which it shouldn’t be in the first place) and that they will enforce it might cause an uproar without DJT having to directly inject himself into the fray.
It’s better for him if this agreement becomes contentious without him acting pre-emptively, I think.