Joe Bidens DHS Blocks Use of Terms Illegal Alien, Assimilation Joe Bidens DHS Blocks Use of Terms Illegal Alien, Assimilation President Joe Bidens Department of Homeland Security (DHS) is blocking the use of the terms illegal alien and assimilation, internal emails reveal. Internal emails sent by United States Citizenship and Immigration Services (USCIS) officials request that staff no longer use the terms illegal alien, alien, and assimilation in reference to federal immigration law, according to Axios. The order comes in the form of a memo signed by USCIS Acting Director Tracy Renaud, where she encourages staff to use more inclusive language in the agencys outreach efforts, internal documents and in overall communication with stakeholders, partners and the general public.