From Institute for Justice:

The amicus brief, which was signed by the Cato Institute, Fines and Fees Justice Center, the Institute for Justice, R Street Institute, and the Southern Poverty Law Center, specifically asked the Court to uphold a Kansas Supreme Court ruling that found that such stops violated drivers’ Fourth Amendment rights against unreasonable searches and seizures. 

Arthur Rizer, Director of Criminal Justice & Civil Liberties at the R Street Institute explained that for his organization, “Allowing for suspicionless seizures of vehicles because the registered owner has a suspended license will only further weaken that founding principle of our Republic: a limited government is a better government.”