Former President Donald Trump named Ohio Sen. J.D. Vance his running mate for the 2024 Republican presidential ticket as the GOP is poised to officially make Trump the party’s nominee at the Republican National Convention.

Vance’s nomination as Trump’s vice president pits him against current Vice President Kamala Harris, who is expected to appear on the Democratic ticket with President Joe Biden.

At 39, Vance will represent a younger generation in an election that features Trump, 78, and Biden, 81, bringing a counterweight to the Democratic ticket that also includes Harris, 59.

Here is how Vance and Harris stack up against one another on the big issues.

Ohio Sen. James David Vance was swept to national prominence by his bestselling memoir, “Hillbilly Elegy,” in which he explored the socioeconomic problems confronting his hometown and the cycle of poverty that had entrapped Americans in the Appalachian Mountains, where his mother and her family had their origins.

Vance himself was harshly critical of Trump before and after Trump’s 2016 election win against Democratic presidential nominee Hillary Clinton, calling him an “idiot” and “America’s Hitler,” among other epithets.