The federal government did not crack down on the Bush-Harriman/Nazi operation until 1942.
In October 1942, ten months after entering World War II, America was preparing its first assault against Nazi military forces. Prescott Bush was managing partner of Brown Brothers Harriman. His 18-year-old son George, the future U.S. President, had just begun training to become a naval pilot. On Oct. 20, 1942, the U.S. government ordered the seizure of Nazi German banking operations in New York City which were being conducted by Prescott Bush.
Under the Trading with the Enemy Act, the government took over the Union Banking Corporation, in which Bush was a director. The U.S. Alien Property Custodian seized Union Banking Corp.'s stock shares, all of which were owned by Prescott Bush, E. Roland 'Bunny' Harriman, three Nazi executives, and two other associates of Bush. 1.
What interest would George Herbert Walker and Prescott Bush have had in funding and overseeing the Hitler project? Let us follow along with Tarpley: