During a Justice Department oversight hearing Tuesday, the former chairman of the House Judiciary Committee accused Director of National Intelligence James R. Clapper Jr. of committing perjury during his Jan. 29 testimony before the Senate Intelligence Committee. Rep. Jim Sensenbrenner, R-Wis., said he believed Clapper’s refusal to acknowledge whether warrantless searches of Americans’ communications had been conducted was perjurious after conceding the point in a letter last week to Sen. Ron Wyden.