Under the Immigration & Nationality Act (INA), conviction of an "aggravated felony" makes long-term permanent resident aliens ineligible for a form of discretionary relief from removal known as "cancellation of removal." Over the last two decades, Congress has slowly but surely expanded the definition of "aggravated felony" to punish immigrants convicted of crimes, revealing the deep unpopularity of "criminal aliens" among the public and policymakers. As a result, since 1996, the nation has deported hundreds of thousands of immigrants each year.