This legislation amends the Immigration and Nationality Act to significantly increase criminal penalties for individuals who illegally enter or reenter the United States. It modifies Section 275, increasing the maximum imprisonment for general illegal entry from two to five years . Furthermore, it introduces a new provision imposing a mandatory minimum sentence of five years , and potentially life imprisonment, for any alien who illegally enters the U.S. and is subsequently convicted of a crime punishable by more than one year of imprisonment. The bill also substantially revises Section 276, which addresses reentry after removal. It raises the general maximum imprisonment for reentry after removal to ten years . More severe penalties are established for specific categories of removed aliens, including those with prior convictions for three or more misdemeanors involving drugs or crimes against the person (up to fifteen years ), those deemed national security threats (a mandatory ten-year sentence), or individuals removed three or more times (up to ten years ). A new mandatory minimum sentence of ten years , and potentially life imprisonment, is imposed for aliens who reenter after removal and were previously convicted of an aggravated felony, any felony, or any crime punishable by more than one year of imprisonment.