This legislation amends the Immigration and Nationality Act to introduce a new section authorizing the mandatory detention and expedited removal of specific categories of aliens. The bill targets individuals identified as members of criminal gangs or foreign terrorist organizations , including those who have provided material support to such organizations. Additionally, it applies to aliens convicted of a broad range of serious offenses, such as any felony , sexual offenses, domestic violence, stalking, and crimes against children, including sex trafficking or sexual abuse of minors. It also covers misdemeanors committed against defined vulnerable groups , which include children under 16, pregnant women, individuals with severe disabilities, or those over 65 years old, as well as assault on law enforcement officers or violation of protection orders. Crucially, aliens falling under these criteria would be deemed ineligible for withholding of removal under any provision of the title.