To stay within ToS, the first few paragraphs of the article state:
“US President Donald Trump isn’t happy about the way some countries are taxing American citizens and companies. He has made clear he’s willing to retaliate, threatening to double taxes for their own citizens and companies.
“Can Trump really do that, unilaterally, as president? It turns out he can, under a 90-year-old provision of the US tax code – Section 891.
“In an executive memo signed on January 20 outlining his ‘America First Trade Policy’, Trump instructed US Treasury to:
“Section 891 of the US Internal Revenue Code is short, but it is in sweeping terms.
“If the president finds that US citizens or corporations are being subjected to ‘discriminatory or extraterritorial taxes’, under the laws of any foreign country, he ‘shall so proclaim’ this. US income tax rates on the citizens or corporations of that country are then automatically doubled.”