Nvidia Corp NVDA has gone from being an AI crown jewel to a geopolitical chess piece. And, it looks like Wall Street just got a front-row seat to a high-stakes poker game between Washington and Beijing.After weeks of tension, the first real blow in the U.S.-China tech trade war has landed: the White House is blocking Nvidia's H20 chip sales to China. "This week were the first shots fired in the trade war in the tech world," said Wedbush analyst Dan Ives.With 145% reciprocal tariffs in play, and tech still a ...