If milk comes from a plant, can you still call it milk? Not according to the dairy industry. Facing growing competition from dairy alternatives like almond, soy and coconut milk, the nation’s dairy farmers are fighting back, with an assist from Congress. Their goal: to stop companies from calling their plant-based products yogurt, milk or cheese. Dairy farmers say the practice misleads consumers into thinking that nondairy milk is nutritionally similar to cow’s milk.