The New Yorker:

The Critics: A Critic At Large:

"Converse concluded that “very substantial portions of the public” hold opinions that are essentially meaningless—off-the-top-of-the-head responses to questions they have never thought about, derived from no underlying set of principles. These people might as well base their political choices on the weather. And, in fact, many of them do."

My only surprise is that political scientist needed a bunch of research to reach this conclusion.