CHICAGO Mayor Richard Daley has apologized for the state of scandal-plagued City Hall, saying he should have done more to prevent corruption in his administration. Federal authorities have spent more than 18 months investigating bribes given in return for jobs in a city trucking program. Earlier this year, that probe was expanded to allegations of fraud in city hiring practices. "I take responsibility for these problems and tonight, I make a commitment to you to do everything within my power to fix them, root out those who engage in misconduct and hold them accountable for their misdeeds," Daley said Tuesday...