Laura Loomer, a right-wing personality known for her incendiary social media presence, appeared to have been sidelined at points by Donald Trump’s campaign and then by his administration.

Novak Djokovic, Jannik Sinner, Aryna Sabalenka and Coco Gauff are among 20 leading tennis players who signed a letter sent to the heads of the four Grand Slam tournaments seeking more prize money ...