Clause 18 of this important section gives the legislative branch the power to make all laws which shall be necessary and proper, and to carry out the enumerated powers (U.S. Constitution, Article I, Section 8, Clause 18).
There are 81 calories in a 1/2 large Sweet Potato (Without Salt, Baked In Skin, Cooked). Calorie breakdown: 1% fat, 93% carbs, 6% protein.
1 252-268 calories in 1 cup of canned sweet mashed potato (9 ounces, or 255g) 2  If you add butter, oil or margarine, the calorie content will be higher: 3  20 calories in a small pat of butter (0.1 oz or 3g  ) 33-34 calories in 1 teaspoon of butter.