Personalized Never Underestimate Stupid People Long Sleeve T-Shirt. Never underestimate the power of stupid people. Donald Trump is the 45th president of the United States of America. Stupid people are dangerous. Pre-shrunk 100% cotton 6.1 ounce long sleeve t-shirt. Double-needle stitched neckline and sleeves. Quarter turned. Shoulder-to-shoulder taping. Adult: S, M, L, XL, 2XL, 3XL