Trump famously won without having the largest donors. He only had 1 big backer (Robert Mercer) in 2016 before the Republican primaries, he was assumed to be a joke candidate. After he won the primaries, he finally got some recognition from the establishment, but even then, they were tepid on investing in him because he was assumed to lose the election.
He’s basically proof of the power of the common man’s vote in the US.
Trump was a billionaire, able to fund his own campaign, that hardly proves the power of the common man. Now, back to 2026, the richest person in the world has spent almost $500 million on helping Republicans in the midterms. Clearly him and Trump don't believe too much in the power of the common man's vote.