Former President Richard Nixon and mobster Charles “Bebe” Rebozo had an affair, a new book claims, the UK's Daily Mail reported.

In Nixon's Darkest Secrets: The Inside Story of America's Most Troubled President, veteran White House reporter Don Fulsom reveals new details about America's 37th president.

Fulsom suggests that Nixon may have had an affair with long-time confidant Rebozo, a Florida banker with links to the Mob.

The 304-page book on bookshelves January 31 alleges that Nixon's 53-year marriage to Pat was little more than a sham. The pair slept in separate bedrooms at the White House and Nixon beat Pat before, during and after his presidency, Fulsom claims.

Rebozo and Nixon are described in the book as inseparable; he even tagged along on family vacations.

According to the book's press release, the book's claims are based on “scores of interviews with members of Congress, White House staffers, and others close to our nation's thirty-seventh president, and invaluable, newly declassified documents and recordings.”

Fulsom covered the White House during the administrations of Johnson, Nixon, Ford, Reagan and Clinton.