I think i figured out how Trump's EO about "foreign tampering" can apply to seemingly American companies.

https://www.forbes.com/sites/niallmccarthy/2017/10/24/which-u-s-companies-have-the-most-tax-havens-infographic/#766031c25706

How is it that Apple, for example, "pays no taxes"?

Because their "taxable headquarters" is in another country with lower corporate tax rates. Like… Scotland/Ireland… something like that.

What other companies "don't pay taxes"?

In what country are they "accountable"?