SACRAMENTO – The stark disparity in wealth and political power that Indian gambling has brought to California reservations has taken two tribes on decidedly different journeys in recent weeks. The Agua Caliente band of Palm Springs already has 2,000 slot machines in two casinos that generate more than $250 million a year for the 400-member tribe. The Quechan band, whose remote reservation straddles the California-Arizona border in Imperial County, has fewer than 800 slots in two small casinos that produced $71 million last year for the 3,600-member tribe. Both tribes negotiated new gambling agreements that would permit expansions – a...