Thomas Jefferson (VP to Adams)
Martin Van Buren (VP to Jackson)
John Tyler (VP to W.H. Harrison)*
Millard Filmore (VP to Taylor)*
Andrew Johnson (VP to Lincoln)*
Chester Artur (VP to Garfield)*
Theodore Roosevelt (VP to McKinley)#
Calvin Coolidge (VP to Harding)#
Harry Truman (VP to FDR)#
Lyndon Johnson (VP to Kennedy)#
Richard Nixon (VP to Eisenhower)
Gerald Ford (VP to Ford)*
George H.W. Bush (VP to Reagan)
*- became President when predecessor died (or in the case of Nixon/Ford, resigned), but NOT re-elected [5]
# - became President when predecessor died, then re-elected [4]
When the president dies the Vice President takes office. In present times if Barack Obama would die Joe Biden would become president.
That scenario has happened exactly four times as of 2017, with Theodore Roosevelt, Calvin Coolidge, Harry Truman, and Lyndon Johnson.
Any office that cannot become President, yes.
The greatest President of modern times left office January 20, 1989
If he is found to not be fit to stay in office, the cabinet can vote to have him removed. Then the vice president will become president. If the president can state in writing that he is fit to continue in office than he may continue. The cabinet then has 48 hours to present a case against the president, to have him removed. The reason that this is in the constitution is for medical reasons. This may not be entirely right, but that is how I understand it. Another way in my opinion would be if the president were to break his oath of office. (Which our president has done several times)
2
No, a President is only allowed 2 terms in office. President FDR was the only President that served more than two terms. He died in office in 22 April 1945. Vice President Harry Truman was elevated to the office of President the same day that FDR died.
He was President eleven different times.
five
2 terms or 8 years
Three times. First time if the president dies or becomes incapacitated that he cannot perform the duties of the Office. The Second and Third times are after winning the national presidential election.
Barack Obama is the 44th president. But we did not have 44 men who were sworn into office-- we only had 43, because one of the presidents, Grover Cleveland, was sworn in two separate times. Cleveland served two non-consecutive terms. He was the 22nd and the 24th president. So, Barack Obama's presidency is the 44th in our history, but 43 men have been elected since our first president, George Washington, took office in 1789.