I'm sure we'll find out lots more about the circumstances around this, but seems notable that one of his first moves was to hire very political lawyer Dr. Debra Katz, who represented Kavanaugh accuser Christine Blasey Ford. https://twitter.com/nytimes/status/1253053108764184576

Per Politico:

"The move was more than a year in the making — Bright had clashed with department leaders about his decisions and the scope of his authority" https://www.politico.com/news/2020/04/22/hhs-ousts-vaccine-expert-as-covid-19-threat-grows-201642