Djokovic and Artaldi both reached out directly to Ken Solomon, the chief executive of the Tennis Channel and a major fund-raiser for both President Biden and the former President Barack Obama. Solomon began calling top Biden administration officials to plead Djokovic’s case, arguing that barring him from the U.S. was unfair and that Djokovic’s presence would significantly bolster attendance at Indian Wells and the economies of the Coachella Valley and South Florida.