He promised to eliminate all US debt within two terms which is impossible short of outright default (needless to say he did the opposite, hugely increasing debt even before corona). He promised Mexico would pay for the wall. Already two utterly unreasonable things to expect.
While it is not really debatable that he did not follow through on these promises, within the context of the worldviews of the people who generally voted for him, it really isn't unreasonable to fulfill those promises. If America could carry out the Manhattan Project, it can carry out these things.
He promised to reduce the trade deficit, but it's much larger now than in 2016, because he doesn't have a fucking clue about international macro and doesn't give a damn either way.
I suspect that that is also debatable, but as it's a problem within Capitalism, a guy like @blackjack21 would probably disagree with you on this, as Capitalists.
He promised to increase taxes for the wealthy, he did the opposite. He promised the bring back manufacturing jobs, but employment in manufacturing increased at the same pace as under Obama (before collapsing due to covid).
But fair enough, if voters just expected lower taxes, less regulation, a more conservative SCOTUS and a tougher stance on China, those expectations were justified.
Trump has two voter blocs; ''Conservatives'', and Nationalist/Populists. The N-P bloc of his voters is usually an independent working class voter, moderate in that they are often social conservatives and economic liberals. Trump alienated them after 2016. His Conservative base, composed of people like @Hindsite, he did very well by, as they are right wing Libertarian types who are often ''Christian'' Zionists.
I wasn't referring to Trump's election promises though, but to Trump's alternate reality bullshit many Americans believe in. That's the really shocking and dangerous part.
Please don't fool yourself. President Trump still has a very good chance of winning re-election using the mechanisms of the US Constitution. If he was cheated out of re-election (aside from the fact of losing more than a few of his original voters who made him win in 2016), he has a definite possibility of winning anyway. The election isn't over, not quite.
I knew he would fight and not concede. Why should he quit yet? Biden was counseled by Hillary Clinton to not ''concede under any circumstances'' if the shoe had been on the other foot;
Trump doesn't have ideals and is only fighting for himself. If voters have ideals and they think Trump is a useful tool to implement them, that makes them opportunists.
It's idealism and not so much opportunism when one is fighting for a way of life. Trump won't destroy that, it is reasoned, while the Liberals definitely are; it's what they do, like Termites on an old wooden house. But more than a few got burned after supporting Trump in 2016.
But man is a fickle and disreputable creature and perhaps, like a chess-player, is interested in the process of attaining his goal rather than the goal itself.