Some Republicans are expressing regret over Donald Trump's selection of Sen. JD Vance as his running mate.

Vance's nomination came at a time when the GOP was confident about the 2024 election, but recent changes in the political landscape have caused concern.

Vance is the least-liked non-incumbent VP nominee since at least 1980, with a net negative favorability rating.

Republicans believe Vance's background could help Trump gain support in key states like Michigan, Wisconsin, and Pennsylvania.

Trump and his campaign have shown no indication of regret over choosing Vance, with plans for Vance to hold solo rallies in Arizona and Nevada.