The academic standards for president have been rising since the collapse of the Soviet Union. Bill Clinton was the first Rhodes scholar. He handed the Oval Office keys to our first M.B.A. president, George W. Bush.
Barack Obama held one of the highest post-graduate honors, editor-in-chief of the Harvard Law Review. The presidential and vice presidential nominees on every Democrat ticket in the past 20 years have a post-graduate degree. This is also true of the only successful GOP ticket in this period, Bush (M.B.A.) and Dick Cheney (M.A.).
There has never been a Ph.D. president during the modern era or anyone holding two post-graduate degrees, or a medical license. President Harry S. Truman never even graduated from college.