Uncertainty around President Donald Trump’s proposed tariffs and trade policy is putting businesses on America’s southern border on edge. With stiff duties possibly coming as soon as March 1, it’s forcing companies to put spending and hiring decisions on hold.

In a dramatic, last-minute move, the Trump administration agreed Monday to pause sweeping tariffs on Mexico for a month while the two sides hammer out an agreement on security and trade, the U.S. and Mexican leaders announced.