"...it is why three distinct branches of government were called for in the Constitution. Each branch was set with limited roles. The executive was granted only the powers to administer government. That would include hiring and firing."

"Under the constitutional framework of government, the president is vested with ultimate administrative authority. That was the founders’ intent. Through that lens, what Trump did earlier this week is exactly what the framers of the Constitution expected the president to do."

https://www.conservativereview.com/articles/heres-why-trumps-authority-to-fire-comey-ensures-your-liberty