Based on his actions since Jan 20, he should be isolated, shunned, denounced and blocked by all available means until he either resigns or is impeached. It doesn't seem like "reason" is something that he will ever listen to, by this point.

That said, in principle it can be useful to have people capable of exerting the kinds of influence he seems to understand better (force, and threats of force). But not a hidebound accommodationist of dubious ethical principles like Kalanack.

(EDIT: apologies, didn't see the upvotes before revising the above substantially).