Truman recognized the State of Israel on May 14, 1948, eleven minutes after it declared itself a nation. Of his decision to recognize the Israeli state, Truman wrote in his memoirs: "Hitler had been murdering Jews right and left. I saw it, and I dream about it even to this day. The Jews needed some place where they could go. It is my attitude that the American government couldn't stand idly by while the victims [of] Hitler's madness are not allowed to build new lives."

Only one president, Woodrow Wilson, had a doctorate (1913-1921), and, in fact, served as president of Princeton University before becoming U.S. President.

James Madison was the shortest President at 5 ft 4 in (163 cm).

In 1849, Abraham Lincoln received a patent for a flotation device for the movement of boats in shallow water. The idea was never commercialized.

Grover Cleveland served two non-consecutive terms and is counted chronologically as both the twenty-second and the twenty-fourth president.

On January 26, 1940, Ronald Reagan married actress Jane Wyman at the Wee Kirk o' the Heather church in Glendale, California. Eight years later, after arguments about Reagan's political ambitions, the couple filed for divorce.

The list of U. S. Presidents who didn't earn a college degree is pretty extensive, including George Washington, Abraham Lincoln, Andrew Jackson, Martin Van Buren, Zachary Taylor, Millard Fillmore, Andrew Johnson, Grover Cleveland, James Monroe, William Henry Harrison, William McKinley, and Harry S. Truman.

Trump was given a 1-Y medical deferment, which was attributed to heel spurs.

McKinley was assassinated on September 6, 1901 during a visit to the Pan-American Exposition in Buffalo, New York.

The four presidents on Mount Rushmore are George Washington, Thomas Jefferson, Theodore Roosevelt and Abraham Lincoln.