I would suggest saying, "I would make an excellent president because...." (List your reasonings). For "Helpful," you don't need to capitalize the first letter. Make sure you add in an "and helpful," since you're finishing off the reasons.
Canadente is spelled incorrectly. It should be "Candidate."
Lastly, I would suggest saying "have had experience...."
Huck and Jim initially start out on two different levels of the totem pole: with Huck, a young, white male being on the top; and Jim, an escape slave, being on the bottom. Huck understands this and thus treats Jim poorly (such as when he plays tricks on Jim or looks down upon him), but after their time spent together as runaways, Huck begins to understand and respect Jim— and even care for him.
Your answer should be WHO.
Think of it like this: You wouldn't say "The boy it (a variant of 'which')", because it simply just sounds odd. Instead, you're wired to think "The boy, he (an unknown name, so it would be 'who')".
I believe everyone is inherently good, but bad circumstances can turn someone evil. For example, in Lord of the Flies Jack was nice at the beginning, but because he wanted to be leader he turned evil. Everyone is always good from the beginning but everything can change just from one circumstance.
