A line of Mexican National Guard and Army trucks rumbled along the border separating Ciudad Juárez and El Paso, Texas, on Wednesday, among the first of 10,000 troops Mexico has sent to its

As the president threatens to impose tariffs as early as this weekend, it's worth noting that Canada is the largest export market for Illinois, followed by Mexico. But Illinois companies import far more from the two countries than they export.

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.