Quite a few First Ladies took very active moves regarding international interests, and they often weighed in their opinions on their husbands’ decisions on related issues. My research was mainly conducted in five Presidential Libraries associated with five well-traveled First Ladies. After studying hundreds of journeys they made, my descriptions were focused on five, one for each lady, of them only. All of these trips shared a common trait, which was under the calling of humanitarian cause.
Tan, Wendy W., "American First Ladies as Goodwill Ambassadors" (2010). CUNY Academic Works.