False. Here is the list since Eisenhower: Ike Eisenhower: O Negative confirmed JFK: as far as I recall, O positive LBJ: no information available Richard Nixon: A negative confirmed Ford: A or O negative Jimmy Carter: A negative confirmed Ronald Reagan: As far as I recall, O positive GHWB: As far as I recall, A positive Bill Clinton: As far as I recall, AB negative George W. Bush: Rh positive Obama: AB negative confirmed Donald: A negative confirmed Some sources: