Even as school administrators and Democratic leaders repeat their promise to shield students and teachers from U.S. Immigration and Customs Enforcement agents, they appear unsure exactly how far to go to prevent federal agents from making arrests on campus.

On his first day in office, Donald Trump launched his second term with a barrage of executive orders. Unsurprisingly, many could have a major impact on Mexico, which shares a 3,145-kilometre border with the US and more than 200 years of diplomatic and economic ties.