The mobility of people, especially from the Global South, is going to be scrutinised and regulated, but it won't have much bearing on state-to-state relations, unfortunately.

Major industries like construction, child care and restaurants rely heavily on undocumented workers, who would be hard to replace, economists and employers say.

Despite his best efforts at saber-rattling, Colombia’s socialist president Gustavo Petro bent the knee and agreed to take in ...