When the upper brass of Bay Area tech flocked east to pay their respects to Donald Trump earlier this year, they surely expected some preferential treatment in return. But instead, the president just hit them where it hurts. Trump revealed sweeping new tariffs on Wednesday, including a 10% baseline tax on all imports and double or triple that much for certain countries. He dubbed the non-baseline tariffs “reciprocal” and noted that some goods would not be subject to those levies, including semiconductor chips, in a win for Silicon Valley. Nonetheless, on Thursday, the very tech executives who kissed Trump’s proverbial...