SACRAMENTO - Just as it appeared that Gov. Arnold Schwarzenegger's vast 2007 agenda might be sputtering, legislative leaders rushed to his aid, approving a $7.4 billion prison-construction plan. It was a deal made under considerable duress - an attempt to dissuade federal judges from releasing inmates early to ease overcrowding at prisons in such areas as Chino, Norco and San Bernardino. Nonetheless, the bipartisan cooperation could create momentum heading into the next five months as lawmakers and the governor hope to pass a budget, agree to redraw the state's political map and vastly expand health-care coverage. There are certainly challenges...