Moneywatch: Trade dispute with Canada

The U.S. is escalating its trade dispute with Canada -- with new tariffs set to hit next month. A major media merger has been put on hold. And McDonald's is adding a sweet and savory upgrade to its breakfast menu. Wall Street kicked off the week with all red arrows Monday, amid rising oil prices and renewed strikes between the U.S. and Iran. The Dow tumbled 307 points. The Nasdaq dropped 12 points. The S and P 500 slid 14 points. CBS News' Jessi Mitchell has the latest business news headlines from New York.