The push by US businesses to make more stuff in America has an ongoing challenge: It's hard to find workers. That's due in part to the country's low unemployment rate, which could make it difficult for companies to bring manufacturing jobs back to the US, says Christian Ulbrich, CEO of the real estate services company JLL. ""There aren't any people to do the work,"" Ulbrich told Business Insider editor in chief Matt Turner at the recent World Economic Forum. Ulbrich says this stands in sharp contrast to Mexico, whose growing manufacturing base could entice companies to make supply chain investments there, rather than in the US. Some corporations, like General Motors and Intel, have — to the delight of the Biden administration — already announced plans to shift more of their supply chains and manufacturing back to US shores, often called ""on-shoring"" or ""re-shoring."