Herman Cain — the maverick American business czar and Republican presidential candidate who campaigned for a sweeping tax reform plan called 9-9-9 — died Thursday morning after a monthlong battle with the coronavirus. He was 74.

Cain, who recently joined Newsmax TV and was set to launch a weekly show, died in an Atlanta-area hospital where he had been critically ill for several weeks.

He was admitted on July 1, two days after being diagnosed with COVID-19.

Ten days before, Cain had attended a rally for President Donald Trump in Tulsa, Oklahoma.