What is the fine-grained topic of the following text: It's not as if the president doesn't have advisors capable of explaining the dangers of too much foreign investment-economist and Trump Trade guru Peter Navarro wrote an op-ed in the Wall Street Journal past year warning that at our current rate "foreigners will eventually own so much of the USA that Americans will wind up working longer hours just to eat and to service the debt". Only return the topic.
Concerns about excessive foreign investment in the USA