Rep. Devin Nunes, R-Calif., the top Republican on the House Intelligence Committee, said Sunday that special counsel Robert Mueller’s Russia investigation team is scraping “the bottom of the barrel” by indicting longtime Trump adviser Roger Stone while also predicting that the “process of discovery” in the case will be a “fascinating” one.

Last week a grand jury indicted Stone on seven counts of lying to Congress, witness tampering, and obstructing a congressional inquiry — stemming from his interview with the House Intelligence Committee in September 2017 as part of its investigation into Russian interference in the 2016 election. Stone has said he will plead not guilty and while he has indicated a willingness to cooperate with Mueller, claims he will not testify against President Trump.