The President of the United States is the most powerful job on Earth, but it's also the most stressful. People say that Presidents often greatly and visibly age during their time in office. From the daily stresses of the job, including people criticizing your every move and having the lives of billions of people affected by your decisions, it's obvious the tolls that are taken on the men who are elected to serve America in its highest office.
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Check out our slideshow of how the Presidents age!