“I didn’t know that it was a crime to write a good book, which turned out to be a best-seller,” the 2020 Democratic presidential candidate told a crowd in Gary, Ind.

“I don’t apologize for writing a book that was number three on the New York Times Best Seller [list],” he added, but reiterated his belief in a “progressive tax system which demands that the wealthiest people in this country finally start paying their fair share in taxes .”