A dozen years ago a friend who was teaching at a multi-disciplinary college (economics, philosophy, psychology, etc.) in Switzerland laughed about a study that demonstrated that people think that the things they believe...are true. Now run that my in your noggin for a few ticks...and see if you chuckle.
Now we all have cognitive biases, but sometimes we can tell that our opinions...are simply that.
Bingling, I hadn’t found a similar study, but one psychology site showed that we believe what we what to believe, as above. While The Truth is a moving target, especially scientific truths, there are also Facts at play in electoral political Brands, and my contention is that many of us tend to Trust The Brand, rather than dig deeper into it, or even discard annoying counterfactuals (past votes, Tweets, and other statements).