Just a few months ago, images of smiling children, police officers and firefighters filled TV screens and mailboxes across the state, urging voters to support major casino expansions for four Southern California tribes. Gov. Schwarzenegger and other government officials promised that the tribes would help balance the state's troubled budget with an influx of gambling dollars. The casino riches would help protect state funding for schools, police and fire departments, health care and roads, the tribes and their supporters said. Voters approved the deals, but recent signs suggest the promises may not pan out. Deals touted as a sure-fire way...