Congress passed a law that permitted government agents to tap the phones of the executives of internet service providers (ISPs) without the probable cause and warrant normally required by the Fourth Amendment. The rationale was that ISPS were involved in frequent violations of citizen's' privacy rights and the taps were needed to uncover evidence of this illegal activity. Allen, the president of an ISP, had his phone tapped. He has challenged the law in federal court. What level of scrutiny will the courts apply to this law?