How Donald Trump lost it

Like Taylor Swift, Kamala Harris did her research, plus: A champion debate coach grades the night

When Taylor Swift capped Kamala Harris’ winning night with a full-throated endorsement Tuesday, the megastar posted on Instagram, “I’ve done my research, and I’ve made my choice,” wrote Swift. “Your research is all yours to do, and the choice is yours to make.” She signed her post, “With love and hope, Taylor Swift, Childless Cat Lady,” a dig at Trump’s…