NEW : `` No one is too big to fail , '' top Senate Democrat says . Lawmakers asked the automakers to describe how they will restructure their businesses to become more competitive . The U.S. Treasury Department said Friday that it will not allow the nation's largest banks and financial firms to fail, a move aimed at preventing another economic crisis. Auto execs return to Capitol Hill this week to offer plans for turnaround . Executives driving to Washington from Detroit in hybrid vehicles .
NEW : `` No one is too big to fail , '' top Senate Democrat says . The U.S. Treasury Department said Friday that it will not allow the nation's largest banks and financial firms to fail, a move aimed at preventing another economic crisis. Auto execs return to Capitol Hill this week to offer plans for turnaround . Executives driving to Washington from Detroit in hybrid vehicles .