(When Hitler invaded Poland ever major US corporation from GE and GM to ITT, IBM, Coca Coal etc. were joint venturing in Germany. GM, GE, Ford, Dupont and ITT actually owning factories building army vehicles and war planes.) [see footnote]
To describe only one such distinguished American investor in Hitler:
The Head of the Hitler Youth had testified that German translations of Henry Ford's The International Jew were required reading for all new recruits. Ford was Hitler's earliest backer and received a decoration from Hitler, who had Henry's photo on his wall.
It was Ford's funds (reported to be as high as $70,000) that helped finance Hitler's failed Bavarian rebellion in Munich. During Hitler's trial it was discovered that Ford's associates came in contact with Hitler's mentor Dietrich Eckart while trying to sell Germany tractors. Eckart asked for financial aid and got it almost immediately from Ford. Four days following Hitler's release from Landsberg prison, Hitler stayed at the home of a wealthy friend where he received a new copy of Mein Leben und Werk (My Life and Work) by Henry Ford, a book he would revere and read carefully. 
In 1928 Ford merged his assets with I.G. Farben, the German chemical cartel, which strengthened the Nazi cause further. Hitler told a Detroit News reporter that he regarded "Henry Ford as my inspiration." Ford supported Nazis until his position made him treasonous.
To show his appreciation for Ford's similar hatred toward Jews, Hitler awarded Henry Ford the Grand Cross of the German Eagle, a Nazi citation reserved for foreign men of distinction. It was presented to Ford on his 75th birthday in his Dearborn office. The award brought immediate concern from Jewish leaders, which led Ford to say that his acceptance of the medal did not mean he had sympathy for Nazism, and he was a person who was repulsed by anything that bred hate. The same kind of medal was given to the head of IBM (who returned it) and American aviation hero Charles Lindbergh, who was haunted all his life by his pre-war pro Nazi statements. Henry Ford never returned the medal though Secretary of the Interior Harold Ickes denounced its acceptance publicly. 
Today the most powerful and respected institutions in America are The Ford Foundation, The Rockefeller Foundation, the Chase Bank. [The Rockefeller Family invested heavily in both world wars and prospered beyond imagination - John Rockefeller's New Jersey Standard Oil was prosecuted in 1945, for having made a fortune selling oil to Nazi Germany through subsidiaries in South America.]
This writer has no doubt that our colleague Swanson had the best of intentions in calling for the prosecution of presidents, as had been called for before with Bush, Johnson, Nixon and even Truman during the Korean police action, but to no avail. It could only be a step in the right direction, if David means it as a taking off point for a broader call for indictment of Americans.