DHS officials working overtime to swear in citizens before Election Day

"The email, from a U.S. Citizenship and Immigration Services field office chief and part of a chain of correspondence within the agency, urges the unnamed recipient to swear in as many citizens as possible "due to the election year." "The Field Office due to the election year needs to process as many of their N-400 cases as possible between now and FY 2016," reads the email, which was disclosed to FoxNews.com by Sen. Ron Johnson, R-Wis., who chairs the Committee on Homeland Security and Governmental Affairs. "If you have cases in this category or other pending, you are encouraged to take advantage of the OT if you can," the email continues. "This will be an opportunity to move your pending naturalization cases. If you have not volunteered for OT, please consider and let me know if you are interested."

Processing citizenship applications so quickly endangers national security, according to Senate Judiciary Committee Chairman Charles Grassley (R-Iowa).

The Department of Homeland Security "seems intent on approving as many naturalization cases as quickly as possible at a time when it should instead be putting on the brakes and reviewing past adjudications, especially in light of this week's Office of Inspector General report that found USCIS granted U.S. citizenship to at least 858 individuals from 'special interest' countries (i.e. countries that are of concern to the national security of the United States) or countries with high rates of immigration fraud, who had final deportation orders under another identity," Grassley said in a letter to DHS Secretary Jeh Johnson. Election Day is 42 (and a half) days away.