(CNN) Randy Credico was subpoenaed Tuesday by the Senate Intelligence Committee to provide testimony and documents related to their Russia investigation, Credico told CNN.

Credico's attorney, Martin Stolar, said he was still unsure how his client planned to respond.

"I'm mulling it over," Credico said.

Roger Stone claimed Credico, a radio host and comedian, was his back channel to WikiLeaks founder Julian Assange during the 2016 campaign. Credico has denied the claim.

The Senate subpoena calls for Credico to testify before the committee on October 5.

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