Surely there were pretty clear signals that a significant number of those people would vote with their wallets based on his politics.
And as everyone was saying last year "Trump can't be THAT bad", you know, before the stock market dropped 3.66 trillion dollars.
And the disappearing people, threats against allies, stripping of hard fought rights, siding with Putin, airbrushing women and non-white men from the history books, declaring Gaza should become a holiday resort and spreading FUD about white genocide etc etc etc