So the whole world wants to know: Were there pee-pee tapes?

Ok, that may not be the most pressing issue, but the Senate Judiciary Committee has finally managed to get someone associated with the controversial dossier on Donald Trump to agree to be interviewed.

The co-founder of Fusion GPS has agreed to meet with the committee behind closed doors.

 In exchange for the interview, the committee will drop its subpoena of Glenn Simpson, co-founder of the Washington-based strategy firm Fusion GPS.

The subpoena was issued last week after Simpson declined the committee’s request to appear before lawmakers in a public hearing.

“However, since that time, Mr. Simpson, through his attorney, has agreed to provide a transcribed interview and requested that the subpoena compelling his attendance at Wednesday’s hearing be waived,” committee Chairman Chuck Grassley (R-Iowa) and Ranking Member Dianne Feinstein (D-Calif.) said in a statement.

This is part of the ongoing investigation into Russia’s interference in the 2016 election, and deals with, specifically, the idea that the Russian government may have something incriminating to hold over President Trump’s head.

Fusion GPS commissioned an ex-British intelligence officer, Christopher Steele, to put together the dossier. The dossier was released by Buzzfeed News in January of this year, before any of its contents had been verified.

To have Mr. Simpson’s testimony could provide a valuable puzzle piece to an investigation that is only really beginning to catch steam.