NasdaqUS STOCKS-Wall St set to open lower as auto tariff threat weighsNasdaq... * U.S. launches auto imports probe, adds to trade jitters. * L Brands, NetApp fall on weak forecasts. * Medtronic, Williams-Sonoma gain after results. By Medha Singh. May 24 (Reuters) - U.S. stocks were set to open lower onThursday as rising ...and more »