possible presidential advantages in foreign policy can be examined in terms of the following factors:
constitutional
political
practical
constitutional
as the president is also the Commander-in-Chief, giving them military policy authority
presidents have used this to act unilaterally without a congressional vote
eg: Obama actions in Libya (2011) & air strikes in Iraq n Syria against ISIS
Trump1 air strikes in Syria following chemical attack & Trump1’s strike on Iranian General Soleimani
Biden’s bombing of targets in Yemen, then Iranian targets after deaths of 3 Americans
2003 Iraq Invasion
executive also has an advantage in presenting their side of the argument publicly
Iraq: Sec of State Colin Powell was pressured to give a speech to the UN, presenting what was known to be dodgy intelligence to suggest link between Saddam n bin Laden
strategy cooked up by Pres Bush n his VP Dick Cheney