Answer:
Here are a "few" roles :D
1) Chief of State
2) Chief Executive
3) Chief Administrator
4) Chief Diplomat
5) Chief Legislator
6) Cheif of Political Party
7) Chief Citizen
Step-by-step explanation:
In my opinion the most important role is Chief of State. It refers to the President as the head of the government. The symbol of all the people.
Hope this helps!