NEW YORK (AP) -- Wall Street's big March rally was officially on hold Monday as concerns about the future of the auto and financial industries led investors to take a break from buying. Major market indicators fell at least 3 percent, including the Dow Jones industrial average, which lost fell 260 points. The White House rejected turnaround plans from General Motors Corp. and Chrysler on Monday, warning that more concessions were needed from unions and creditors before they could be approved. Fears of an automaker bankruptcy have been looming over investors for months, and the latest developments made the market...