redgarl :
The problem is all the chips are american. China cannot build graphic card without GPUs or laptops without CPUs. If they tax them and sell their product back to the US, like Apple for example, then it is going to be a nightmare.
Many of the patents may be held by USA companies but most of Intel, UMC, TSMC, GloFo, etc.'s chip foundries are elsewhere and many of them pass through China at some point during manufacturing/assembly/packaging before going back to the USA for sale.
A Trump tax on electronics that have passed through China will screw up most manufacturers and vendors in the USA.