U.S. vice presidential candidate J.D. Vance is a study in contradiction

Open this photo in gallery: From the left: Former U.S. President Donald Trump, Melania Trump, U.S. Senator and 2024 Republican vice presidential candidate J.D. Vance and his wife Usha Vance stand onstage during the last day of the 2024 Republican National Convention on July 18.JIM WATSON/Getty Images J.D. Vance is a mess of contradictions. He once mused about whether Donald Trump, then a candidate for U.S. president in 2016, was "America's Hitler," before becoming one of Mr. Trump's biggest supporters. Mr. Vance is a former venture capitalist who has said big tech companies should be broken up, an anti-elite and…