Answer:The problem was that Charles II did not have an heir. The French wanted Duke Philip to succeed the throne while the Hapsburgs recommended Archduke Charles to the throne. Both sides had firm claims and this would affect the balance of power in the area.
An important duty of the president is "negotiating treaties," since this duty falls to the executive branch, and the president is in charge of this branch (although this specific task is often delegated to the State Department).