The Burden Of Proof Is In the President's Court

How is it reasonable that the president should not be required to prove he is a United States citizen? It is time for this charade to end. I had to produce a birth certificate to prove I was eligible for social security. They would not have granted me that benefit despite all the years I'd paid into it if I had not complied. How is it that the president, the highest office of the land, can defiantly refuse to prove what every citizen must prove to receive government benefits? It is preposterous. This brave and dedicated officer is putting his career on the line for principle, something the president seems rather short of.