Gov. Gavin Newsom has publicly declined to endorse any of the Democratic candidates to succeed him —but privately complained about the underwhelming options as pressure grows for him to weigh in on the messy race, per a new report. The terming-out governor has vented to close advisors about the Democratic frontrunners for California governor — branding billionaire Tom Steyer, who’s surging in polls, as “all over the place” and former Rep. Katie Porter as a business-killer. The dramatic