Julie Nixon Eisenhower married into another presidential lineage.

Daughter of Richard and Pat Nixon

A vocal supporter of her father after the Watergate scandal broke, Julie Nixon Eisenhower lives on a Pennsylvania farm away from the public eye. She married David Eisenhower, President Eisenhower's grandson, uniting two of the country's most powerful political families.

She wrote a biography about her mother, "Pat Nixon: The Untold Story," and she helps manage her father's presidential library. She and her husband also authored a memoir about her grandfather-in-law, "Going Home to Glory: A Memoir of Life with Dwight D. Eisenhower."