The 1989 Cher song "If I Could Turn Back Time" comes to mind when I think about the end of the Kamala Harris' campaign to be the Democratic candidate for president. Maybe you remember the song – "If I could turn back time/if I could find a way/I'd take back those words that've hurt you ..." Well, if Senator Harris had a time machine, I suspect she would go back to about exactly a year ago, when sh…