1923: Hitler’s failed coup.

No real consequences.
No fundamental changes.

1933: Hitler takes power.

I wish I could implant this into everyone’s brain.

@Strandjunker

Changes like effective Antitrust laws. Starting with media and big tech.
Taking the Federal rolls, redistricting, and election operations away from the states, with a Federal Electoral Commission, like Australia.
Must have stronger data privacy laws.
Election on weekends or making election day a Federal public holiday.