Trump and his advisers have repeatedly insisted that the U.S. president can pretty much do whatever he wants and that the pesky Congress need only be consulted rarely.
Trump, grandson of a German immigrant, is particularly peeved at an independent South Africa, which was the worst example of a Western supremacist-cum-colonial mindset.
What perhaps remains unresolved, is how long the American electorate will allow Trump to reduce their country into a paranoia state, an empire of appalling tantrums and ragtag diplomacy.