The answer is by issuing a blue slip. It refers to two different legislative procedures in the United States Congress. In the House, it refers to the refusal slip given to tax and spending bills sent to it by the Senate that did not came from the House in the first place, per the House's clarification of the Origination Clause. In the Senate, it refers to slips on which Senators from the state of residence of a federal judicial nominee give a view on the nominee. The blue slip policy of the Senate Judiciary Committee assures that even senators of the opposition party receive at least a consultative role regarding appointments of federal district and appellate court judges, U.S. attorneys, and federal marshals whose controls are geographically tied to the senator's state.