Saying that “America’s sovereignty is under attack,” President Donald Trump’s declaration of a border emergency comes at a time of relative calm after years of deep turmoil.

US President Donald Trump has declared a national emergency on the border with Mexico, saying “America’s sovereignty is under attack.”

As active-duty U.S. soldiers began moving toward the nation's southern border to confront what President Donald Trump called "a national emergency," much is still unclear about their mission, including whether they would be armed,