article_snippet: Ronald Reagan: 69 years, 349 days .
article_snippet: William Henry Harrison: 68 years, 23 days .
article_snippet: James Buchanan: 65 years, 315 days .
article_snippet: George H. W. Bush: 64 years, 222 days .
article_snippet: Zachary Taylor: 64 years, 100 days .
article_snippet: Dwight D. Eisenhower: 62 years, 98 days .
article_snippet: Andrew Jackson: 61 years, 354 days .
article_snippet: John Adams: 61 years, 125 days .
article_snippet: Gerald Ford: 61 years, 26 days .
article_snippet: Harry S. Truman: 60 years, 339 days .