James Monroe, the 5th president of the US was president during the Missouri Compromise.
The office of President didn't exist until 1789.
John Kennedy was the president when this event occurred.
Theodore Roosevelt
Thomas Jefferson
If any US President were to die during their term of office, then the US Vice President would be sworn in as President.
President Woodrow Wilson declared war on German in World War 1 and was in office during the war.
Nixon was the only President to resign from office.
No US citizen may hold a title of nobility. Therefore a Vice-President, who must be a citizen of the US to hold that office, cannot accept the title of Duke of Andalusia before during or after holding that office.
Woodrow Wilson was the US president during WW I.
Martin Van Buren was president of the US during 1840.
A+ precious metals