Passage: There are four living former First Ladies: Rosalynn Carter, married to Jimmy Carter; Hillary Clinton, married to Bill Clinton; Laura Bush, married to George W. Bush, and Michelle Obama, married to Barack Obama. The first First Lady was Martha Washington, married to George Washington. Presidents John Tyler and Woodrow Wilson had two official First Ladies; both remarried during their presidential tenures. The wives of four Presidents died before their husbands were sworn into office but are still considered First Ladies by the White House and National First Ladies' Library: Martha Wayles Skelton, married to Thomas Jefferson; Rachel Jackson, married to Andrew Jackson; Hannah Van Buren, married to Martin Van Buren; and Ellen Lewis Herndon Arthur, married to Chester A. Arthur. One woman who was not married to a President is still considered an official First Lady: Harriet Lane, niece of bachelor James Buchanan. The other non-spousal relatives who served as White House hostesses are not recognized by the First Ladies' Library.

Question: John Tyler and Woodrow Wilson shared one common fact that seperated them from other presidents, what was it?
both remarried during their presidential tenures