U.S. President Donald Trump's first week in office has been a whirlwind of executive action on a number of different policy fronts. Countries around the globe are keeping a particularly close eye on the new leader's positions on trade after Trump threatened to impose tariffs against several states. For instance, the White House recently raised the possibility of slapping a 20 percent tariff on goods imported from Mexico to fund the construction of a wall along the United States' southern border — a cornerstone of Trump's agenda on the campaign trail. One way Trump could put new tariffs into place is with the help of his Republican allies in Congress.