From my perspective it seems clear that the American public has been in the grips of anti-intellectualism for quite a long time. In 1980 Asimov made the following famous statement:
There is a cult of ignorance in the United States, and there always has been. The strain of anti-intellectualism has been a constant thread winding its way through our political and cultural life, nurtured by the false notion that democracy means that “my ignorance is just as good as your knowledge."