Congress Looks at How Justice Uses New Power After passing the antiterrorism bill in record time in the fall, the House and Senate Judiciary Committees are making an unusually prompt and thorough, if sometimes unsuccessful, effort to determine how the Justice Department is using its new powers. This week, the House panel agreed to let the department have a few more days to finish answering 50 questions, some with as many as seven parts, that it submitted on June 13. Representatives F. James Sensenbrenner Jr., the Wisconsin Republican who leads the panel, and John Conyers Jr. of Michigan, its senior Democrat, asked about the law section by section, questioning how new authority like sharing grand jury information, easier search warrants, greater ability to deny entry to the United States and other features had been used and to what effect. The Senate committee, which has shorter lists of questions that await replies, had planned to question Attorney General John Ashcroft on Thursday. But Mr. Ashcroft canceled his appearance, which would have been his first before the committee since Nov. 25. The cancellation prompted Senator Patrick J. Leahy of Vermont, the chairman, to send what the senator's spokesman called a stern letter of complaint. Senator Charles E. Grassley, the Iowa Republican who is probably the Senate's most devoted advocate of vigorous oversight, complained that the department's answers were not very satisfying. He characterized the response as stonewalling and said that considering all the additional power voted, "there is less reason for us to tolerate this stonewalling." http://www.nytimes.com/2002/07/14/politics/14PATR.html