Can the United States prosper by weakening Europe and China?

Donald Trump’s recent decision (before the meeting with Xi Jinping on the sidelines of the G20) concerning tariffs (China), technology transfers to China; his statements concerning Brexit and the risk that there may be further tariffs on European products, show that Trump wants to weaken Europe and China, his ambition being to boost the United States’ economy and power . But can the United States prosper by weakening Europe and China? Such a weakening would: Dampen global trade and US exports; Weaken US companies located in Europe and China, especially as these companies could be affected by retaliatory measures; Push down global demand for oil and the oil price at a time when the United States has become a large oil producer.