I’d prefer he not interact with her at all.
The more the First Family does that, the higher her profile is then boosted. Oh well. It is what it is.
Don Jr. is a very spontaneous person, who does as he pleases.
The higher the profile of dingbats like Griffin; the harder it becomes for (relatively) sane Dems to gain profile. If Griffin, and her ilk, become the face of the anti-Trump ‘resistance’; that will help Trump — a lot more than passively ‘rising above the fray’.