Even before the city manager abruptly announced this week he'll be stepping down, San Jose faced looming political battles and financial challenges. Now, city and community leaders worry that the council will be unable to resolve critical issues in the coming year -- from passing a budget to bringing BART to the city, to building a new ballpark. ``I don't think we can underestimate the difficulty that our government is facing,'' Councilman Ken Yeager said Wednesday. City Manager Del Borgsdorf announced his impending departure a week after the council censured Mayor Ron Gonzales for his role in a secret trash-hauling...