Celebrities and sports stars took to social media over the weekend to urge athletes from around the sporting world to “take a knee” during the National Anthem, after President Donald Trump said Friday that any players who protest in that manner should be fired by their team’s owners. Celebrities including Jeffrey Wright, John Legend, Evan Rachel Wood, Sarah Silverman, Kumail Nanjiani, Daniel Tosh, and Ed Asner, and sports stars including NBA player Chris Paul and NFL cornerback Richard Sherman all took to their Twitter accounts to weigh in on the NFL protests. At a rally in Alabama Friday, Trump said...