China remains the threat, not the company in which it is manufactured, because TP-Link is a Chinese company. Why moving manufacturing to the US matters is that in the US the facility is on US soil, so federal authorities can legally conduct unannounced physical audits. They can verify that the firmware being loaded onto the routers matches the exact code submitted to regulators, to make sure no backdoors were slipped in at the last second. Since you agree this isn't to create jobs, and also seem to believe that volt, flax, and salt never happened, I guess you prefer to give Trump far more credit than he deserves for his amazing "5D Chess" skills.