| Not long ago, it was widely expected that Donald Trump’s presidency would strengthen the dollar—even as it weakened America’s economy and the world’s. Yet two days after Mr Trump’s tariff blitz, the greenback is sinking. Why, and how worrying is that?
China has come out swinging in response to Mr Trump’s levies, matching them with extra tariffs on American goods. That has sent markets into a nosedive again, and will only damage China’s economy further. We explain that there are better ways to fight back. | 
