For those who haven’t heard: Donald Trump chose Ohio Senator J.D. Vance as his vice-presidential running mate in this year’s election.

I’ve been listening to the talking heads as they keep coming back to Vance’s youth: his fortieth birthday will be August 2. I’m not talking about experience, but simply his age.

While the millennials they’ve interviewed are thrilled that one of their generation is on the ticket, the talking heads have several times compared his age to Theodore Roosevelt’s (who was 42 years 128 days old when he took office as vice president, but six months later, William McKinley was assassinated, and TR became the youngest-ever president). Interestingly—at least, to me—they’re not talking about Richard Nixon, who turned 40 two weeks before he was inaugurated as vice president in 1953 (he served two terms under Dwight Eisenhower, lost the presidential election of 1960 to John Kennedy, and then was elected president in 1968).

The record-holder in terms of being the youngest vice president is John C. Breckinridge, James Buchanan’s vice president. Breckinridge was 36 years 318 days old when he was inaugurated in 1857. He had served in the House of Representatives from 1851 to 1855, and after his vice presidency, served several months in the Senate, before siding with the Confederacy (the Senate branded him a traitor, and expelled him in December 1861). He later served as the CSA’s fifth and final Secretary of War, from February to May 1865.