President Xi Jinping's head must be spinning as his U.S. counterpart Donald Trump ropes China into his impeachment mess.
Yet his calls for Beijing to investigate Joe Biden, Trump's main rival, ahead of the 2020 election are the least of Xi's worries. The U.S. president is melting down in plain sight, and as his legal jeopardy increases, he grows more likely to strike out wildly. Trade-reliant economies across Asia are in harm's way.
