Looks like the President is able to appoint an “interim director” without Senate confirmation as long as the appointee is at a certain level of the FBI. If anybody here knows the rules, please enlighten the rest of us. The same thing appeared to happen at DOJ when the female was fired. At least, looks like McCabe is on his way out and is nothing but a place holder.
According to Wiki, L Patrick Gray, who worked at the DOJ, was picked to be the interim director when Hoover died.