Mahmoud Khalil, the Columbia University student and pro-Palestinian activist who was detained by U.S. immigration authorities for more than 100 days, is seeking $20 million from the Trump administration over what he says was his false imprisonment and malicious prosecution.

A growing number of migrants in the US are heading north to seek asylum, even as Canada adopts increasingly restrictive immigration policies of its own.

ICE agents last month arrested the most people in at least five years, but deportations are still lagging far behind what President Donald Trump has promised.