In a joint committee on October 3, 2018, Baker was questioned in a closed-door interview on his knowledge of the Christopher Steele dossier, classified information leaked to the media, and invoking the 25th Amendment against President Trump.
Baker’s testimony confirmed what former acting FBI Director Andrew McCabe previously said about national security officials strategizing to remove President Trump from office. Baker said Rosenstein made a serious suggestion to wear a wire when near the president in order to collect evidence that the president obstructed the investigation on Russian collusion. Baker also said he suspected Rosenstein was acting in response to the firing of James Comey, and that he felt he had been "used" by the president in his justification for firing Comey.