Merck CEO Kenneth Frazier, one of America’s most prominent black CEOs, quit President Trump’s manufacturing council this morning over Trump’s failure to condemn white supremacists after a weekend of violence at a white nationalist and neo-Nazi protest in Charlottesville, Virginia.

“America’s leaders must honor our fundamental values by clearly rejecting expressions of hatred, bigotry and group supremacy, which run counter to the American ideal that all people are created equal,” Frazier said in a statement. “As CEO of Merck and as a matter of personal conscience, I feel a responsibility to take a stand against intolerance and extremism.”

Frazier was the only black member of Trump’s manufacturing council.