“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.”

Parts of the email were redacted before it was disclosed to FoxNews.com, but it was sent by the branch chief of the Houston Field Office District 17. It was not clear to whom it was addressed.

“I couldn’t have said it better!” reads the July 21 note introducing the forwarded missive. “It’s the end of the year crunch time, so let’s get crunchy! Go Team Houston! Thanks for all your hard work!”

Johnson and Sen. Charles Grassley, R-Iowa, in a Wednesday letter to Department of Homeland Security Secretary Jeh Johnson, said it appears the agency is trying to swear in new citizens as the election between Democrat nominee Hillary Clinton and GOP choice Donald Trump approaches.

“Your department 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,” the senator’s letter read.

Johnson referred to a report this week from the Department of Homeland Security’s Inspector General that found at least 858 people from terror hotspots and other countries of concern had been mistakenly granted citizenship despite facing orders of deportation under other identities.