Réponse:
1)the president is the head of state, the head of gouvernment of the USA and commander in Chief of the armed forces.
3) je suis pas sure mais: the president is responsible for the execution and enforcement of the laws created by Congress. He has the power either to signlegislation into law or to veto bills enacted by Congress.
2)je croix: the president has the power to negotiate and sign treatled.