Radio host Randy Credico, a former associate of Republican attack dog Roger Stone, says he was subpoenaed by the Senate Intelligence Committee on Tuesday to provide testimony for its Russia investigation. Credico, who Stone had previously claimed served as a backchannel to WikiLeaks during the 2016 presidential campaign, has said he’s not sure how he will respond. “I’m mulling it over,” he was quoted as saying by CNN. The comedian has denied involvement with WikiLeaks and has already testified before special counsel Robert Mueller’s grand jury. Tuesday’s subpoena reportedly calls for him to provide testimony to the committee on Oct. 5 and turn over a variety of documents related to Stone, WikiLeaks founder Julian Assange, and Guccifer 2.0, the Democratic National Committee hacker later identified as a Russian intelligence officer. The committee’s subpoena also seeks communications related to any attempts to obtain “derogatory information” on Hillary Clinton, CNN reports.