Here's a copy of the letter:
BREAKING: Here’s the letter Schiff and Nadler sent to Mueller accompanying their subpoena to testify on July 17. pic.twitter.com/nqP7ZMLtHT— Kyle Cheney (@kyledcheney) June 26, 2019
And the subpoena:
And here is the text of the MUELLER subpoena: pic.twitter.com/nA2XDhS6DN— Kyle Cheney (@kyledcheney) June 26, 2019
Although Mueller is reluctant to testify about what took place, he said he'd respect the subpoena.
House Intelligence Chair Adam Schiff tells reporters Mueller was reluctant to testify but— Heather Caygle (@heatherscope) June 26, 2019
“He has agreed to honor the subpoena.”
Adds that Mueller will testify before Judiciary and Intel Committees separately but “back to back.”
Chairman Schiff also said Mueller's staff will be available to answer questions as well.
NOTABLE: Mueller deputies/staff will also be on hand to brief lawmakers in a closed session, SCHIFF confirms.— Kyle Cheney (@kyledcheney) June 26, 2019
Special Counsel Robert Mueller has agreed to testify before the House Judiciary and House Permanent Select Committees on July 17 in an open session. The announcement comes after House Judiciary Committee Chairman Jerry Nadler (D-NY) and House Permanent Select Committee Chairman Adam Schiff sent a letter to Mueller with subpoenas requiring the Special Counsel to make an appearance.
“Pursuant to subpoenas issued by the House Judiciary and House Permanent Select Committee on Intelligence tonight, Special Counsel Robert S. Mueller III has agreed to testify before both Committees on July 17 in open session,” the Chairmen said in a statement.
"Americans have demanded to hear directly from the Special Counsel so they can understand what he and his team examined, uncovered, and determined about Russia's attack on our democracy, the Trump campaign's acceptance and use of that help, and President Trump and his associates' obstruction of the investigation into that attack," the Chairmen said. "We look forward to hearing his testimony, as do all Americans."
This post has been updated with additional information.