Trivia: Which U.S. President had his sister initially serve as First Lady?
Martin Van Buren
William McKinley
Herbert Hoover
Grover Cleveland
The correct answer is Grover Cleveland
So why is this answer correct? : Grover Cleveland was elected President while he was still a bachelor, so his sister Rose Cleveland took on the duties of First Lady for part of his first term. He later became the first and only President to be married at the White House, and his bride Frances became First Lady after their wedding in June 1886.