A bombshell federal fraud case exploded inside Newsom’s powerful orbi…

As Gov. Gavin Newsom flew around the country last year campaigning for President Biden and Vice President Kamala Harris, his chief of staff Dana Williamson — known as one of California’s toughest political insiders — was not only helping to helm the ship in Sacramento, but under criminal investigation by federal law enforcement.

The resulting criminal case, which splashed into public…