At home, the elder of a family can decline to find out about his prostate problems and the only affected people are his spouse and children. But when you are the commander in chief, the President of the United States, you are obligated to be as fit as possible. If you aren't being screened for diseases, you aren't being a good steward of the position you swore to do to the best of your ability. You are putting self over duty. Everyone involved in this should come forward and explain their rationale.