Who has served as the US First Lady and at the same time not been married to the US President?

purrrr

"The only President never to marry, James Buchanan turned to Harriet Lane, an orphaned niece whom he had earlier adopted, to act as his First Lady." http://en.wikipedia.org/wiki/James_Buchanan Jan 20 10, 8:33 PM

guitargoddess

Grover Cleveland's sister also served as First Lady during his first term. http://en.wikipedia.org/wiki/Rose_Cleveland Jan 20 10, 8:40 PM

guitargoddess

Also, Mary Arthur McElroy, Chester A. Arthur's sister, as his wife had died before he became President (and Arthur's nice and daughter also acted as White House hostesses) http://en.wikipedia.org/wiki/Mary_Arthur_McElroy Jan 20 10, 8:43 PM

guitargoddess

And John Tyler's daughter-in-law was First Lady between the death of his first wife and when his second wife assumed the duties. http://en.wikipedia.org/wiki/Priscilla_Cooper_Tyler (Sorry, suppose I should have finished looking for the answer before posting) Jan 20 10, 8:45 PM

guitargoddess

Umm found some more.. - Martha Randolph, Thomas Jefferson's daughter (her mother was dead) - Emily Donelson, Andrew Jackson's niece ("unofficial" First Lady because Jackson's wife was ill then died) - Mary McKee, Benjamin Harrison's daughter (her mother was very ill, and then died) http://en.wikipedia.org/wiki/List_of_First_Ladies_of_the_United_States_by_longevity Jan 20 10, 8:50 PM