The president has been granted certain powers such as negotiating and signing treaties with foreign countries rather foreign diplomats with the consent of the Congress and has the power to veto laws. In addition to that, they also have the power to appoint ambassadors, the cabinet and federal judges. For instance, President George H.W. Bush nominated Clarence Thomas for the Supreme court. Other constitutional powers include them to command the military, i.e.
to commit troops as the Commander in Chief of all American military forces. Along with certain formal powers, the US president has multiple informal powers which in general may lead to his advantage when compared with constitutional monarchy.