Saikat Chakrabarti, former chief of staff for Rep Alexandria Ocasio-Cortez, D-N.Y., who recently launched a campaign against Rep. Nancy Pelosi, D-Calif., was once pictured wearing a shirt that depicted a Nazi collaborator.

Saikat Chakrabarti said he would initiate a bid to challenge former Speaker Nancy Pelosi (D-Calif.) in the party primary for the seat she's held for more than two decades, citing concerns with new government regulations.