If you can convince people that their vote won't be counted, that it won't matter, that voting might be scary with ICE agents at the polls, that Elon can just do magic hacking with space lasers and change the result anyway... you can depress turnout.
This is all nonsense. Voting does do something and this simple fact is so inconvenient and frustrating that tons of money and energy is spent trying to convince you otherwise.
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