Those are political appointments. They have different employment conditions than regular government employees.
From http://www.aclu.org/library/pbp12.html
(OK, it's the ACLU, but nobody generaly accuses them of not knowing the law.)
Q: Does the employment-at-will doctrine apply to all employees?
A: No. There are three broad categories of employees who are not governed by employment-at-will:
* Government employees: Federal, state and local government workers are protected by the Fifth and Fourteenth Amendments, which prohibit the government from depriving any person of "life, liberty or property" without due process of law. These employees are considered to have a property interest in their jobs, and the right to due process places significant restrictions on arbitrary dismissals unrelated to job performance. Some additional protection is provided by federal, state and local civil service laws.
Etc.
A word of advice; it's a mistake to personally attack someone for ignorance, unless your own credentials are impeccable. I doubt you have a law degree, and it's not clear you're any better informed than those you're attacking.
You've yet to show me the ACLU's distinction for 5th amendment purposes between a political appointed who WORKS FOR THE GOVERNMENT and the theoretical government employee they reference (and fail to cite any case law to support). Show me how smart you are. :)