Washington — Democratic Rep. Eric Swalwell, who is running for California governor, denied allegations that he sexually assaulted a former staffer.   "These allegations are false and come on the eve of an election against the frontrunner for governor," Swalwell said in a statement. "For nearly 20 years, I have served the public — as a prosecutor and a congressman and have always protected women." Swalwell threatened to take legal action against the woman, who detailed the alleged encounters to