February 26, 2021 No research is ever complete. That’s something US president Joe Biden will need to keep in mind as he attempts to overhaul the country’s supply chain. His order on Wednesday for a 100-day government review of supply chain vulnerabilities across high and low-tech industries is partly a response to pandemic shortages caused by disruptions to global trade. As factories closed during Covid-19, shipping patterns broke down and companies failed to move goods from factories to consumers. But US companies have already been dancing around this issue for years, with limited success. Thanks to several years of rocky US-China trade disputes and China’s rising costs, global firms have weighed detangling themselves particularly from China and sourcing closer to home.