Bill Clinton was called the first black president because he crossed racial lines so easily, a distinction he lost when Barack Obama became the first actual black president. But for decades, some Americans claimed that the nation’s first black president was really Warren G. Harding.

It turns out that he wasn’t, really. At least that is the result of new DNA testing that according to scientists showed for the first time that Harding almost certainly had no recent ancestors with African blood, despite assertions that were spread far and wide a century ago in efforts to sabotage everything from his marriage to his political career.