Image copyright
Reuters
Bubba Wallace (C) with his team at the Pocono Organics 325 race last month.
Wallace is the sole full-time black motorist in the United States racing organisation and was important in it prohibiting the Confederate flag from races.
President Trump called the story a hoax and recommended Wallace ought to apologise.
Wallace, 26, got messages of uniformity from fellow Nascar chauffeurs and sports stars around the world after the disco