BUTLER, Pennsylvania – Just over four hours before former President Donald J. Trump was set to speak at the Butler Farm Show Complex off Buttermilk Road, Harry Norman – like 50,000 other people who came to spend the day at the rally – was walking across the freshly cut pastures that surrounded the stage where Trump would speak.The 75-year-old Vietnam veteran who spent more than 20 years in the military cut a determined figure in the midsummer heat, making his way toward the last of the few seats left before the overflow crowd began accumulating. Wearing a green cotton T-shirt, jeans, and a…