Saying the ailing economy is putting enough stress on taxpayers, Senate Republican leader Dave Cogdill said Tuesday that Republicans will oppose any tax hikes to bridge California's budget deficit. Cogdill suggested the deficit, which he pegged at $16 billion for the fiscal year beginning July 1, could be wiped out through service cuts and tapping into the reserves of voter-approved initiatives intended for early childhood education, mental health services and transportation. Taxpayers already are grappling with "record gas prices (and) food prices going through the roof," Cogdill, R-Modesto, said during a meeting ... "They're very concerned about their mortgages, and...