Recognizing that the President would not be interviewed voluntarily, we considered whether to issue a subpoena for his testimony. We viewed the written answers to be inadequate. But at that point, our investigation had made significant progress and had produced substantial evidence for our report. We thus weighed the costs of potentially lengthy constitutional litigation, with resulting delay in finishing our investigation, against the anticipated benefits for our investigation and report. As explained in Volume II, Section II.B., we determined that the substantial quantity of information we
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