J.D. Vance, Trump’s running mate, transitioned from critic to loyalist. Ohio-born U.S. senator, ‘Hillbilly Elegy’ author, and Marine veteran aligns with Trump. Opposed Ukraine aid, backed by Carlson and Barrasso, criticized for opportunism. Downplayed January 6th, endorsed by Trump, supported by Trump Jr. Vance’s abortion views and Rust Belt stance affect moderate voters.