USG Corp. rejected a $2.1-billion takeover bid...

USG Corp. rejected a $2.1-billion takeover bid from Desert Partners LP, telling the investment group it has “no interest in discussing your proposal.” Desert Partners, a partnership of investors that includes Texas oilmen Jack Brown and Cyril Wagner, made its $42-a-share cash and debt offer to buy Chicago-based USG, the nation’s leading maker of gypsum board, earlier in the week, five months after announcing that it had a 9.8% stake in the company.