Which US President's presidential yacht was bought by Elvis Presley in 1964?

The presidential yacht bought by Elvis Presley in 1964 was associated with Franklin D. Roosevelt.

The vessel was the USS Potomac, which served as President Franklin D. Roosevelt's presidential yacht from 1936 until his death in 1945. Originally built as a Coast Guard vessel, it was transferred to the U.S. Navy and renamed Potomac before becoming the presidential yacht.

Elvis purchased the yacht in January 1964 for $55,000. His intention was charitable: he gave it to St. Jude Children's Research Hospital in Memphis so it could be used in a fundraising effort. The hospital ultimately sold the vessel for $65,000 rather than keeping it as an operating asset.

The question can cause confusion because several U.S. presidents owned or used yachts. Theodore Roosevelt used the USS Mayflower, while John F. Kennedy used the presidential yacht Honey Fitz. The specific yacht linked to Elvis was Roosevelt's Potomac.