JD Vance’s VP test looms large for GOP

​ In the weeks since becoming Donald Trump’s chosen running mate, freshman senator JD Vancehas found himself caught in the middle of major test for a shifting Republican Party: Can a young lawmaker who represents the most populist voices in the party actually catapult Republicans to victory, or are he and his message still a liability that could cost Donald Trump the White House? Read More Breaking News, Latest News and Videos | CNN