The man Donald Trump has chosen to be his running mate in November’s presidential election is the author of a book that German Chancellor Olaf Scholz found “touching.” In his 2016 autobiographical book “Hillbilly Elegy,” JD Vance described the crisis of the white working class in the US as industries shuttered. It became a bestseller there – and Scholz was also a fan. But Scholz has long since taken a more critical view of the author, who once criticized Trump as “cultural heroin” but later became a US senator with Trump’s support. Vance, 39, was announced on Monday as Trump’s pick for vice pr…