Who is the only President who never got resign?

In the vacuum of space how does acceleration and motion work? Why did the Russians want jfk dead? What are three areas did Kennedy say he would focus on during his presidency? How do you spell the sound of being frightened? How might the marbury v Madison ruling effect future action congress? Is Patrick Kennedy? Children names of John F. Kennedy? How did president Johnson advance the cause of American liberalism? How did Andrew Jackson dress? When did Ted Vollrath die? Does long term debt and short term portion of long term debt include interest? Which organization did President Kennedy inspire thousands of Americans to join to share their experience and knowledge with less fortunate nations? Explain why consumer credit can be costly? When will hudson securities become a market maker for the benguet corporation? How often are the engines of Air Force one replaced? Formula for net operating expenses? Is tax planning ethical? Is the US Navy safer than other branches of the military? Which president relied so heavily on his chief of staff during his early years that the public thought that his advisor was making all the decisions? Does a torpedo have to be launched in the water?