His position as acting Attorney General unconfirmed by the Senate is already tenuous, and it isn't much of a leap to consider his legal vulnerability if he takes any action to protect the President.
Mr. Whitaker himself is now a fact witness in that investigation and should recuse himself from overseeing it. His refusal to follow the advice of career ethics officials and recuse himself from the Russia probe makes us doubt he will do so here, but he is nonetheless irretrievably compromised.