Since there is not a multiple choice answer visible to us, i'm not sure what you mean but ill try my best. One of the most important things that the president must do is, being able to decide to sign treaty's/go to war. Another thing that the president must be able to decide on is to bring in people to help him in cort. Hope this kinda helps...but i'm pretty sure there should be a multiple choice here, if there is ill be able to help much more!