President Trump’s immigration policies have injected new uncertainty for U.S. border communities that are already suffering after waves of clampdowns.

As soon as the sun glints over miles of border fence dividing the United States and Mexico, the engines of cargo trucks packed with auto and computer parts roar to life along border bridges and bleary-eyed workers file into factories to assemble a multitude of products geared toward the U.

Tariffs on Canadian and Mexican products set to go into effect on February 4th have been paused for a month. U.S. President Donald Trump said he was levying a 25% tariff on goods from America's closest neighbors as a way to stop illegal immigration and fentanyl from crossing the border.