Who is the head of the CIA of Estes is the Deputy Director? Deems like Estes is in charge of stuff that should be up to the director.
A lot of people ask that, but it is kind of a theme IMO.
They never show never shows or mention the actual President, only VP Walden. The CIA Director is never introduced, only the context of his/her title, a job that Estes covets.
It is more of a faceless goal/aspiration, being President for Walden and Director for Estes.
I guess the writers find it unnecessary to show us the President or Director until they want to include them in the story somehow. Instead, they choose to focus on the wants and desire of the characters we already know.