Which U.S. President Had the Most Presidential Relatives?

There's no denying that politics can be a family business. The Clintons, the Rockefellers, the Bushes, and the Kennedys are among the many families that have made a significant impact on U.S. history and politics at the highest levels. But what's less obvious is just how many U.S. presidents were actually related to one another, either through blood or marriage. Of course, George H.W. Bush and his son, George W. Bush, were both elected to the nation's top job, as were Founding Father John Adams and his son, John Quincy Adams. In the 19th century, William Henry Harrison was the grandfather of Benjamin Harrison.

Theodore Roosevelt and Franklin D. Roosevelt were fifth cousins, although the list of FDR's presidential relatives certainly doesn't end there. In fact, the nation's longest-serving president was related to 11 other presidents, albeit distantly. In addition to Theodore Roosevelt, FDR's relatives and relatives-in-law included John Adams, John Quincy Adams, James Madison, Martin Van Buren, William Henry Harrison, Benjamin Harrison, Zachary Taylor, Andrew Johnson, Ulysses S. Grant and William Howard Taft. FDR was even related to his own wife – Eleanor Roosevelt was Theodore Roosevelt's niece, making her the fifth cousin once removed of the 32nd president.

The presidential family tree: