The Republican presidential ticket came together on Monday when Donald Trump named J.D. Vance as his running mate. In turning to the 39-year-old Ohio senator, the Republican nominee injected new energy into a campaign that has centered in recent weeks on questions of age following President Joe Biden’s disastrous debate performance.

The 39-year-old Vance rose to national fame with the 2016 publication of his memoir, “Hillbilly Elegy.” He was elected to the Senate in 2022 and has become one of the staunchest champions of the former president’s “Make America Great Again” agenda, particularly on trade, foreign policy and immigration.