 So who is JD Vance? He is half Trump's age. Trump is 78. Vance is 39-year-old. He joined the Marine Corps out of high school. He served in Iraq. Vance graduated from Yale Law School. He gained fame for his book, Hillbilly Elegy, which was made into a movie and was first elected to the U.S. Senate in 2022. President Biden's campaign released a statement on Vance being named Trump's pick, slamming Vance as someone who will, quote, further Trump's extreme MAGA agenda.