This question is actually self-defeating. The president fired Comey FOR CAUSE. Comey is a known corrupt political tool of the Clinton’s. He was also handled by Barack Obama via Loretta Lynch. His leadership of the FBI spawned such corrupt upper level types as Ohr, McCabe, Strzok, et al. Proposing a law limiting the president’s ability to dismiss personnel who are employed “at the will” of the executive branch, handcuffs an efficient and lawfully run government. In other words, an employee who is openly hostile to the White House cannot be fired even though his or her actions are detrimental to the United States. As soon as a democrat controlled congress and White House occupant prevail, this law would be rescinded on January 21st of their ascendancy.