There is one reason and one reason only why Kamala Harris made a big splash when she declared her candidacy for president in January and then shrunk in a crowded field since then: Harris is not who she presents herself to be. And that realization tends to dawn on people after she exhausts her talking points and must demonstrate more than being telegenic and effusive. Harris looks dazzling at first sight. She has a great personal story. She’s been wildly successful in her career at every step of the way. But Harris’ story of who she really is eventually douses...