I need some “homework help” from a tutor please? :)I need two real examples for

I need some “homework help” from a tutor please? :)I need two real examples for each following role of being President: 
Party Leader
Personnel Recruiter
Domestic Crisis Manager
Treaty Negotiator                                  
You can use actions of any of the following presidents:  Nixon, Ford, Carter, Reagan, Bush Sr., Clinton, or Bush