On a side note, this reminds me of the ending to "The Plot Against America"; both the TV and the book story.
In the book, they explicitly state that FDR rigged the snap election after Limbergh's mysterious death with such blatant and unapologetically brazen fraud so that, narratively, they could do a "happy ending" deal where FDR gets restored to power, immediately forcing the US into WW2 for the purpose of beating Hitler and restoring the status quo of history. While also giving the fig leaf of a motive for Limbergh's behavior in the novel by claiming that the Nazis kidnapped his kid and were using him as hostage fodder to make Linbergh run for Presidency and that the Nazis killed him when he managed to get a reunion with his kid only to find out that Hitler's people had utterly brainwashed his son into becoming a Nazi, that Linbergh had to be killed due to him being horrified at his son's brainwashing.
In the movie, they have Linbergh's racist VP be the one who is stealing the election wholesale and explicitly leave it vague who won so that, if Trump had won, David Simon could have done a second season of the show and gone all la resistance. He also explicitly fucked up the ending too, by painting Linbergh beyond redemption evil and EXPLICITLY having the British MURDER HIM so they can replace him with someone who will get America to break it's neutrality to help them win WW1 (and had one of the main cast be instrumental in the assassination) while having the "Linbergh was blackmailed" thing be used to make fun of QAnon, as far as Simon's hate boner for Linberg and Trump shining through, as far as him making his adaptation of TPAA be his own personal "Why the fuck doesn't one of our allies murder Trump for us?" revenge porn. Along with foreshadowing the left being ready to steal the election from Trump by preemptively putting out a piece of anti-Trump propaganda that accuses the other side of what they were already planning.