I guess this is a thinly veiled attack on China, but I'm a bit confused why there's a feud between the US and China in the first place. Perhaps my ignorance is down to being British and a bit out of the loop, but could someone give a rough outline on what the underlying motives for this are?
* Trump has been on at China for a long time.
* US establishment growing increasingly worried about the sophistication of Chinese tech and are viewing Huawei as a strategic threat. Especially since the latest generation of Chinese telecoms tech has arguably leapfrogged western offerings. Free trade works brilliantly until you stop being the top dog.
* NSA doesn't the idea of Chinese being able to use their tech to spy on US. They'd prefer domestic US companies build tech to spy on us for them instead.
* "National security concerns" is kind of a "get of jail free card" when it comes to escaping WTO rules on protectionism, so it fits in pretty well with the rest of the trade war.