The purpose of this legislation is to address the fentanyl public health crisis in the United States by suspending the entry of certain individuals, referred to as "covered aliens." The bill aims to reduce the risk of fentanyl, a highly potent synthetic opioid linked to a significant number of overdose deaths, being smuggled into the country. Key provisions of the legislation include a suspension of the admittance of covered aliens, defined as individuals attempting to enter the U.S. unlawfully from Canada or Mexico without the necessary travel documents.