That gets complicated too. The way multinationals are usually setup - particularly with incompatible jurisdictions like US + China - is for a new company to be formed in the country they want to do business in, but with shares wholly owned by the parent. (In the case of China, they often need to partner with a domestic Chinese company that owns some of the shares - this is a sticking point in US/China trade relations, because it's commonly a front for industrial espionage.) Google China is not an American company; it is a Chinese company, headquartered in Beijing, that is partially owned by Google, which itself is owned by Alphabet.
If you want to block cross-border capital flows, you're looking at a lot of collateral damage. Apple, Coca-Cola, Pepsi, Nike, McDonald's, KFC, Altria (Phillip Morris), and many others would lose > 50% of their revenue if they could not do business through international subsidiaries that operate according to the laws of the country that they do business in. That's a lot of American jobs lost and a lot of underfunded pension plans.
The problem with a lot of "too bad - just close the borders and have American companies build things in America for Americans" is that it ignores that the 1950s utopia they want to go back to was itself built on globalization. America was the engine of the Marshall Plan, and basically rebuilt the world after WW2. That allowed Americans of the 50s-80s to enjoy standards of living well above what the domestic economy would support. If we actually wanted to shut ourselves off from the world, the resulting economy would likely look a lot more like the America of the 1850s (before steamships made crossing the ocean a routine occurrence) or the North Korea/Cuba/Iran of today (as examples of other countries that have isolated themselves from the world economy).
If you want to block cross-border capital flows, you're looking at a lot of collateral damage. Apple, Coca-Cola, Pepsi, Nike, McDonald's, KFC, Altria (Phillip Morris), and many others would lose > 50% of their revenue if they could not do business through international subsidiaries that operate according to the laws of the country that they do business in. That's a lot of American jobs lost and a lot of underfunded pension plans.
The problem with a lot of "too bad - just close the borders and have American companies build things in America for Americans" is that it ignores that the 1950s utopia they want to go back to was itself built on globalization. America was the engine of the Marshall Plan, and basically rebuilt the world after WW2. That allowed Americans of the 50s-80s to enjoy standards of living well above what the domestic economy would support. If we actually wanted to shut ourselves off from the world, the resulting economy would likely look a lot more like the America of the 1850s (before steamships made crossing the ocean a routine occurrence) or the North Korea/Cuba/Iran of today (as examples of other countries that have isolated themselves from the world economy).