The San Francisco Health Commission is calling on Mayor Gavin Newsom to back away from demanding $26.7 million in health cuts, saying it would mean decimating the city's safety net for the poor, homeless, mentally ill, and drug-addicted. Newsom has ordered all city departments to submit midyear cuts to eliminate a deficit that could reach $125 million. The Public Health Department has been told to cut the most because it is the city's biggest agency.