Who was happiest about Donald Trump’s Monday decision to pick Ohio Sen. and former ivory-tower Appalachia whisperer J.D. Vance as his vice presidential hopeful? It wasn’t rural America, swing-state independents, or women voters. It wasn’t the conservative intelligentsia or the Catholic hard-liners, despite Vance’s self-pronounced conversion. It certainly wasn’t the traditional Republican donors currently opening up their checkbooks for Trump, or even Vance’s own Senate colleagues. In actuality, it was the Big Tech and venture capital ambassadors who were the happiest of all. Trump had been the target of a heated effort from Silicon Valley types of all strata (well,...