(NBC NEWS) – Joe Biden on Wednesday doubled down on his statements about working with segregationist senators, telling reporters that he has nothing to be sorry for.

Biden dismissed criticism of the comments, including from fellow Democratic presidential candidates such as Sen. Cory Booker of New Jersey, who called on Biden to apologize.

“Apologize for what? Cory should apologize,” Biden said. “He knows better. There’s not a racist bone in my body.”

The former vice president cited his past voting record and his work on the Voting Rights Act while head of the Senate Judiciary Committee. Biden claimed he didn’t have to like someone else’s views to make his case and beat them.

“I’ve been involved in civil rights my whole career,” Biden continued before walking away to a fundraiser in Chevy Chase, Maryland. “Period. Period. Period.”

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