By Donald M. Payne Jr. When people see me coming down the House floor or arriving at a public event, the first thing they often notice is the hard plastic boot around my right foot. That boot isn’t a fashion statement — it’s a result of the toll that diabetes has taken on my body as I fight a diabetic ulcer. And it’s a constant reminder of what I’m fighting for every day in Congress. As one of 37 million Americans living with diabetes, I depend on steady access to insulin to regulate my blood sugar. If you’ve never been in this kind of a situation, it can be easy to dismiss the struggles that …