First of all, the landscape is:
The first two are the only leverages that US has, and not big leverage. From pure technological perspective, US has not been a major player since long time ago (less than 20% IP in 5G, no major equipment vendors, smaller market than China).
- Qualcomm has just some 15% share of patents in 5G. The rest belongs to Europe, China, SK and Japan.
- Some US companies are among the best in making components (ZTE ban exhibited).
- US has no system vendor after Lucent (former ATT) was purchased by Alcatel.
- Alcatel-Lucent is gradually dying in 4G, and probably dead in 5G.
So I think the treacherous plan of Trump in 5G is like this: by blocking Chinese vendors out of US market and the other "five-eyes" market US try to force China to give Huawei and ZTE more preferred position in Chinese market as a compensation. If China does it, Ericsson and Nokia will be the casualties, this will anger the EU even though EU knows well who is the root cause. This is Trump's plan to put a wedge in between EU and China. It is the same act in "Iranian sanction" where US forcing EU to quit the deal or disabling EU's ability to fulfil their obligation to Iran will make Iran angry of EU, another wedge.
Once again, the basic thinking of Trump is a new iron curtain that break the world in two camps so US can remain the King of one camp. The question is who is willing to live in that camp behind the wall.
There is more to it than that. Huawei surpassed Apple in smartphone sales and is 2nd just behind Samsung. They had a deal with AT&T in the USA to carry their phones but the US government pulled the plug on that.