First Quarter US GDP came in at 0.2%, which is down from 2.2% in the Fourth Quarter. This isn't really a huge drop in US economic growth as you might think at first blush. When GDP is calculated, exports are added and imports are subtracted. The strong USD is making imports 'cheaper' and throttling exports to euro using countries that must pay much higher prices for US goods.
China of course is right there to sell the exact same things as the US at a more favorable exchange rate, as more countries are simply trading in the yuan instead of converting them to USD first. Not that the US is a big exporter anyway, but Europe does use the US as a 'cheap labor' factory floor. Overall the top US exports are gasoline, fuel oil and petrochemicals. Our chief 'manufactured' export to China remains recycled cardboard.