James Buchanan was never married. Thomas Jefferson, Andrew Jackson, Martin Van Buren and Chester Arthur were widowers while they were in office. Grover Clevelan had no wife when he first took office, but acquired one before he left.
John Tyler, Benjamin Harrison and Woodrow Wilson had wives who died while they were in office and so had no wife until they either remarried or left office.
The U.S. President that did not have a wife was James Buchanan, and whenever married. He was the 15th American President and served in office from 1857 to 1861.
President Benjamin Harrison.
The first president to get married while in office was John Tyler. John Tyler was also the first president to have his wife die while in office.
The constitution states the terms of office and how a president or Vice President can be removed from office.
Clinton
Thomas Jefferson was the first president who did not have a wife when he took office. He wife had died . James Buchanan was the first to have never been married when he took office.
The president in office during the Chesapeake-Leopard affair was Thomas Jefferson.
The Oval Office was built during President Taft's administration.
John Tyler
During their time in office, President Obama had a more impactful vacation policy compared to President Bush.
President Lyndon B. Johnson
The vice president would take office because the constitution states that if the president dies or resigns during his term in office the vice president serves the rest of the term