Whether or not presidents age quicker than normal while in office.

One one hand, these in particular have the fate of at least 230,000,000 people in their hands, the strong opposition of another entire political party, an assassination attempt is plotted aganst them who knows when, some of their actions and views may be polarizing. Stress = gray hair and wrinkles?

On the other hand, it’s just the normal physical differences of 8 years.