House Intelligence Committee Chairman Rep. Devin Nunes (R-Calif.) is demanding the original FBI document that outlines the bureau's reasoning for opening a counterintelligence investigation into the 2016 Trump campaign's alleged connections to Russia.

His deadline for the Department of Justice (DOJ) and FBI to provide the unredacted document is April 11. In a letter sent Wednesday to Deputy Attorney General Rod Rosenstein and FBI Director Christopher Wray, Nunes threatened to take legal action if the agencies do not comply, noting that the committee issued subpoenas in August that "remain in force."

According to Nunes, the previous response to his request was a "heavily redacted version" of the document, which Nunes called "unsatisfactory."

Nunes also requested unrestricted access to four Federal Intelligence Surveillance Act (FISA) applications the DOJ used to obtain a warrant to spy on former Trump campaign adviser Carter Page.

The application was at the center of a controversial committee memo written by Nunes and the panel's Republican majority that claimed the DOJ had improperly obtained the warrant by using information contained in a salacious dossier of opposition research on then-presidential candidate Donald Trump.

Republicans have declared the House committee's investigation into Russian interference concluded without evidence of collusion by the Trump campaign. Some Democrats on the committee have said they will continue the investigation.