Ethics?  Anyone?  Anyone? Re federal public service, here are just a few of several fundamental, long established ethics principles for everyone from top (President) to bottom.
1. Public service is public trust, requiring you to place loyalty to the Constitution, the laws,and ethical principles above private gain. 
2. You shall not hold financial interests that conflict with the conscientious performance of duty. 
3. You shall not engage in financial transactions using non-public Government information or allow improper use of such information to further any private interest. 
4. You shall not engage in outside activities that conflict with your official Government duties and responsibilities.