DETROIT -- The union president at the Saturn plant in Spring Hill, Tenn., said General Motors Corp. has decided not to build a new front-wheel-drive minivan there, leaving workers wondering whether they will have any vehicles to assemble in the future. Company officials confirmed the minivan plans have been canceled, but said they had never made a decision on where it would have been built. In a newsletter dated Tuesday, UAW Local 1853 President Mike O'Rourke said the GM board decided Thursday to cancel the new minivan, which he said was tentatively scheduled to be built at the Spring Hill...