American Warriors: Five Presidents in the Pacific Theater of World War II. This site is promoting a book by Duane T. Hove. In addition to teaser material to encourage purchase of the book, there are a variety of pictures of American Presidents in uniform during the Second World War. I have not read the book so I can not speak to the quality of that source but the topic does look interesting.
From the site:
Presidents Lyndon Johnson, John Kennedy, Richard Nixon, Gerald Ford and George Bush served their country as Navy Reserve officers in World War II. Most biographies gloss over this important period of the presidents' lives and are often inaccurate. American Warriors reconstructs the presidents' wartime roles in the Pacific Theater based on interviews with more than one hundred World War II veterans and on primary sources such as action reports, ships' logs, war diaries, and letters.