The upper levels of university administrations need and want to maintain “a welcoming environment,” said James Dorsett, director of international students and scholars at Michigan State University in Lansing. “It’s the responsibility of the whole institution as a learning institution to be a welcoming and supporting place for all students.” Dorsett pointed to the “You are welcome here” video campaign that many U.S. schools participated in to promote inclusion for international students who might have felt fearful when the executive order was announced.

Protecting our nation is one of the most important roles of the federal government, and we do need to be thoughtful about how to establish effective immigration polices. However, the broad-based nature of the ban flies in the face of decades of support for the power of international exchange. Even a foreign policy hard line approach would typically be softened by an ongoing support of international exchange.

The Liberal Democrat president, Tim Farron, has called for the government's new billboards to be shredded. Nigel Farage said it was a nasty campaign with elements of Big Brother. The text on the ads runs: "In the UK illegally? Go home or face arrest." It continues: "106 arrests last week in your area*." The asterisk is there to indicate that this is a made-up figure, relating to no particular area, and no particular week.