“I think he knows full well, as a lot of other people do, that there was a difference in people who felt they needed to give a president the leverage to be able to get Saddam Hussein back to the table, without having to go to war, and that that vote was unfortunately structured in a way that it was sort of either-or,” Kerry said, according to an NBC report.

Sanders’ speechwriter, David Sirota, lambasted Biden in a series of tweets, telling supporters that he “isn’t getting away with rewriting history about how he helped lead America into the Iraq War.”

Sanders’ senior campaign adviser Jeff Weaver later released a statement saying Biden “made explicitly clear that he was voting for war.”

“It is appalling that after 18 years Joe Biden still refuses to admit he was dead wrong on the Iraq War, the worst foreign policy blunder in modern American history,” Weaver said.