“Why should I care about celebrity endorsements,” you say, “even if it’s a celebrity I happen to like?” Good point. You probably shouldn’t. There’s no celebrity bigger than Oprah Winfrey, right? She endorsed Hillary in July 2016. Clinton went on to lose almost every important battleground narrowly. Likewise, there’s no celebrity American athlete bigger than LeBron James. He not only endorsed Clinton, he campaigned for her in the final days of the race in his home state of Ohio. She ended up losing there by eight points.