So really the change between 2020 and 2024 is not a popularity increase for Trump, but a huge popularity loss for Biden/Harris.
Now the question is, how did Biden/Harris manage to be so unpopular, that 12 million people decided to rather risk Trump winning, than vote for them again?
Trump didnt gain or loose many voters.
Biden/Harris lost a lot of voters.
So really the change between 2020 and 2024 is not a popularity increase for Trump, but a huge popularity loss for Biden/Harris.
Now the question is, how did Biden/Harris manage to be so unpopular, that 12 million people decided to rather risk Trump winning, than vote for them again?
Answer : Russian propaganda about Harris supporting a genocide, while blatantly dodging the question of trumps desire for Israel to “finish the job”.
People are gonna get exactly what they voted for (or really, failed to vote against) in the next 4 years.