JD Vance, the Ohio freshman senator and Donald Trump's chosen running mate, has been at the center of a major test for the Republican Party. As a representative of the populist voices within the party, Vance's selection raises questions about whether he can lead Republicans to victory or if his message could be a liability for Trump's campaign.
Despite facing criticism for past remarks and stances, Vance's Republican colleagues in the Senate have largely stood by him. Many senators believe that Vance embodies where they see their voters moving and represents a new generation within the party.