David J. Bier is the associate director of immigration studies at the Cato Institute. He is an expert on legal immigration, border security, and interior enforcement.

Bier’s work has appeared in the New York Times, the Washington Post, USA Today, and many other print and online publications. The U.S. Supreme Court and multiple federal appeals courts have cited his research and writing. Bier has testified before the House Judiciary Committee’s Subcommittee on Immigration and Citizenship.

‘Irreparable Harm’

In court, the administration claimed that any delay in implementing the travel ban would be disastrous. After losing in court, they’ve waited weeks to fix it.