Facing threats of legal action, the Justice Department on Wednesday provided the House Permanent Select Committee on Intelligence with a two-page document showing the FBI’s basis for opening the Russia counterintelligence investigation during the 2016 presidential campaign.

The agency provided the document, known as an Electronic Communication, or EC, after California Rep. Devin Nunes and South Carolina Rep. Trey Gowdy met with Deputy Attorney General Rod Rosenstein.

Nunes sent a letter to Rosenstein and FBI Director Christopher Wray April 4, demanding an un-redacted copy of the EC, as well as access to applications for surveillance warrants against President Donald Trump’s former campaign adviser, Carter Page. Nunes set April 11 as the deadline for the document production.

In an interview on Tuesday, Nunes threatened to potentially impeach Rosenstein and Wray if they refused to turn over the EC.