Yes, Iraq was probably the worst US foreign policy decision ever made by a President. Jason had said earlier that W was worse than Trump. I conceded that you could make a case maybe that W was worse in foreign policy. I do think that Iraq was the worst decision ever.
That looks like "current events bias" too. I can think of three Presidents' US foreign policy decisions that had far worse consequences for America, and probably for the world, than our stupid Iraq debacle.
(3) Truman's decision to reverse Roosevelt's policy and supply France with the troop transports it needed to reoccupy "French" Indochina after the Japanese surrender.
(2) Johnson's decision to take ownership of France's Viet Nam disaster after France threw in the towel.
(1) Wilson's decision to enter the war and thereby torpedo the progress that was being made toward a negotiated draw in WWI, thereby bringing about an Allied victory, a vengeful France with the power to punish Germany, and WWII.