Following news reports overnight that Special Prosecutor Robert Mueller had issued one or more far-reaching subpoenas as part of an ongoing probe into Russian election interference, former Trump campaign aide Sam Nunberg on Monday let it be known that while he had received such a request, he would not be cooperating with Mueller or submitting to the demand for 2016 emails.

“Let him arrest me. Mr. Mueller should understand I am not going in on Friday.” —former Trump aide Sam NunbergDuring remarks on MSNBC, where spoke live on the phone with anchor Katy Tur, Nunberg said he would not hand over emails demanded by the subpoena and also acknowledged that while he believes Mueller “may have something” on President Trump, he could not specify what that might be.

“I think that [Trump] may have done something during the election,” Nunberg said. “I don’t know that for sure.”

Described as “Mueller’s Hit List” by Axios, which first reported on the existence of the subpoena on Sunday, the requests was said to be for “all communications — meaning emails, texts, handwritten notes, etc.” between the witness receiving it and an extensive list of Trump’s top advisors which included:  Carter Page, Corey Lewandowski, Donald J. Trump, Hope Hicks, Keith Schiller, Michael Cohen, Paul Manafort, Rick Gates, Roger Stone, and Steve Bannon.

Nunberg not only acknowledged the existence of the subpoena, as he was the apparent recipient of it, but also said it had arrived with a request to appear before the grand jury, but that he would not be cooperating. “Why should I hand them emails from November, 2015?” he asked.