[tripletpeaks]

It’s also a topic of scientific study with a century or more of literature.

It’s a little more complicated than what you wrote, but basically: yes.

[edit] Example study construction: pick some issue where there’s been a heavy propaganda push against it from one party, but a law they opposed passed anyway. Ideally, something like a tax increase, that can directly affect voters in a way they might reasonably be expected to understand and know about. Observe that the (say) tax hike affects not more than 2% of the population you’re studying. Survey. Observe that 35% or 40% of people say the new tax law increased their taxes, and very nearly all of them favor the party that opposed the hike and was claiming or implying it would affect more people than it did.

Repeat similar studies over a period of decades, always with familiar outcomes. Draw conclusions.

Separately, you can probe basic understanding of how our government & various policies or laws work. You’ll find half of everyone not knowing how marginal income tax rates work, that almost all the people who think our foreign aid spending is way too high believe it’s 10x, 20x, 30x higher than it actually is, et c. Generally speaking, voters hardly know how anything works, so of course they buy lies about it. That’s not me being shitty, it’s what the evidence overwhelmingly says is true. And this is far from an exhaustive treatment of alarming traits & behaviors of the electorate.