Donald Trump keeps making promises that experts don’t think he can possibly fulfill. It might seem that he has people fooled by his implausible claims, which include pledges to make Mexico pay for a border wall and to bring manufacturing jobs back to the United States. The psychologist David Dunning, for instance, has suggested that many voters are backing Mr. Trump because they lack the expertise to recognize his mistakes.
But in some news reports, his supporters sound more realistic about what Mr. Trump, the presumptive G.O.P. nominee, could accomplish as president.