In acquiring French's and other food products from Reckitt Benckiser Group, McCormick & Co. is getting a business that's been under more pressure in recent years. Long dominant in ketchup, Kraft Heinz has rolled out a yellow mustard in supermarkets and taken market share. Until now, McCormick has been best known in the U.S. for seasonings, such as Grill Mates and Old Bay.