The eighth and final episode dropped last night, and the whole series has been a masterpiece. Bottom line is, all these Nazi sympathizers and Nazi collaborators got off scot-free. The judge during their trial died of a heart attack, causing a mistrial, and by then WWII was over. The Justice Department didn't have the motivation to retry the defendants.
Roosevelt had died during the war, and his Vice President, Harry S. Truman, had been a Senator. He was very close to all of the Congressmen implicated in the Nazi plot. When John Rogge delivered his final report on the matter, in 1946, Truman decided it had to be classified "Top Secret" and never made public.
The War was over, and America was working hard to recover and move on.
Rogge was so incensed at the lack of accountability for Nazi sympathizers, sympathizers who had actively advocated for the overthrow of the US government, organizers who had used the very halls of Congress to lobby for its overthrow, that he refused to accept the Top Secret burial of his report. He began leaking bits of it to the press. He was fired and ostracized for his efforts, but he managed to get almost all of the politicians involved to lose their seats the next time they stood for re-election.
The politicians involved may have wanted to put the whole business behind them, but the public did not want Nazi sympathizers in office.
The plotters who weren't in elected office disappeared into the woodwork, to become founders of right-wing organizations and think tanks that still thrive today. That still, by some accounts, are quietly working behind the scenes to subvert American Democracy and install authoritarian rule which would be much more friendly to them. Nazi sympathizers have become Russian sympathizers and right-wing fascist dictator sympathizers, who do business starting wars, supplying arms, and then getting no-bid contracts afterward to rebuild the countries.
It's a lesson that needs to be learned.