This should be easy. Confirmation that Kamala Harris is sane and sentient would — in an ideal world — be more than enough for her to beat Donald Trump in Tuesday night’s debate.
Trump’s flaws are too well known to need rehearsing. Even Dick Cheney — nobody’s idea of a liberal — has announced that he will be voting for Harris. The former Republican vice-president labelled Trump as the greatest threat to the American republic in its 248-year history.
But the reality is that Harris needs to do much more than give an adequate performance. The last major poll taken before the debate suggested that Trump now has a one-point lead over Harris.