The House Judiciary Committee authorized its chairman on Wednesday to use a subpoena to try to force the Justice Department to give Congress a full copy of Special Counsel Robert S. Mueller III’s report and all of the underlying evidence used to reach his conclusions. The chairman, Representative Jerrold Nadler of New York, said he would not immediately issue the subpoena. But the party-line vote won by Democrats who control the committee ratchets up pressure on Attorney General William P. Barr as he decides how much of the nearly 400-page report to share with lawmakers.