Former Director of National Intelligence James Clapper said Thursday he would make “unmasking” requests to reveal the identity of a U.S. citizen every “couple of weeks” during a more than six-year period. His comments about unmasking were made to conservative radio host Hugh Hewitt, who asked about then-President Barack Obama’s U.N. Ambassador Samantha Powers’ testimony in which she said other people had used her name to make unmasking requests. Mr. Clapper said he did not know how that could happen, and that during his time as DNI director, he would make a unmasking request “once every couple of weeks, something...