Democrats continued their all-out assault on Gov. Mitt Romney, unleashing a scathing, "South Park"-like Internet ad yesterday that pokes fun at the governor's staff and paints him as an egomaniacal power-seeker.

Titled "The Secret RNC Tape," the satirical animated short features Romney delivering a secret speech at last month's Republican National Convention in New York that's filmed by a bumbling cartoon version of his communications director, Eric Fehrnstrom.