If the past year has proven anything, it’s that smartphone makers need China to thrive. What they don’t need, alas, is the United States.

And that’s a problem for companies that are not based in China. Last year, China-based Huawei surpassed Apple to become the number two smartphone maker by sales volume. And it’s only a matter of time before it passes Samsung to obtain the top spot. As bad, two other Chinese smartphone vendors---Xiaomi and Oppo---could soon join