Appearing on a televised town hall Monday, the 2020 frontrunner doubled down on his claim that no wrongdoing took place while he was vice president.

“Every single, solitary, serious investigator… looked at this and said there’s absolutely zero basis to the accusation that I acted inappropriately or that my son did,” Biden told the Iowa audience. “This is all about Trump trying to create a diversion… There’s not a scintilla of evidence pointing out that anything is wrong.”

After calling Trump’s personal attorney Rudy Giuliani a “chump,” Biden dismissed Republicans’ inclusion of his son on their testimony wish list.