Interesting that the Chief Justice was politely "invited" to Congress. Curious about whether Congress might subpoena a member of the Supreme Court I found an interesting Volokh Conspiracy link discussing that very question. The writer considers the question from a half dozen angles and concludes...
"I have serious doubts about whether Congress has the power to subpoena a judge to testify about internal judicial matters. I think Congress could justify that subpoena as part of an impeachment inquiry. But a general need for information to craft legislation would not be suitable."
Interesting that the Chief Justice was politely "invited" to Congress. Curious about whether Congress might subpoena a member of the Supreme Court I found an interesting Volokh Conspiracy link discussing that very question. The writer considers the question from a half dozen angles and concludes...
"I have serious doubts about whether Congress has the power to subpoena a judge to testify about internal judicial matters. I think Congress could justify that subpoena as part of an impeachment inquiry. But a general need for information to craft legislation would not be suitable."
https://reason.com/volokh/2020/07/25/can-congress-issue-a-subpoena-to-federal-judges-about-internal-judicial-deliberations/
Speaking of links, that link to Renee Richards is super-timely.