If you're an employee of the government, working to publicly undermine the policies of the person elected to lead your branch of government doesn't seem like a

If you're an employee of the government, working to publicly undermine the policies of the person elected to lead your branch of government doesn't seem like a good way to keep your job. I can't think of many instances where Executive Branch employees used official outlets to undermine a sitting President's policies in the past. Can you?