Pizza as a vegetable (because of tomato sauce) was California under Reagan. Michelle Obama said to eat healthy and exercise more, though "eat healthy" still used the MyPlate guidelines.
Note that this legislation did not classify pizza as a vegetable ... it disallowed regulations that would have made the amount of tomato paste in pizza no longer be classified as a vegetable (i.e., it continued to be so classified) ... but the disallowed change in regulations still would have classified a larger (4x) amount of tomato paste to be classified as a vegetable. And of course tomato paste is not the same thing as catsup (or ketchup).