Herman Cain, a pizza business magnate who unsuccessfully ran for the 2012 Republican Party nomination for president, has died Thursday due to complications from coronavirus.

Cain had tested positive for COVID-19 on June 29. Just two days later, he was hospitalized after developing “serious” symptoms of the disease, according to a message that appeared on his Twitter account in early July.

“There is no way of knowing for sure how or where Mr. Cain contracted the coronavirus,” a statement on Cain’s website said about his hospitalization.