IT’S SUBPOENA TIMEhttp://www.nytimes.com/2007/06/08/opinion/08fri1.html[NYT] For months, senators have listened to a parade of well-coached Justice Department witnesses claiming to know nothing about how nine prosecutors were chosen for firing. This week, it was the turn of Bradley Schlozman, a former federal attorney in Missouri, to be uninformative and not credible. It is time for Senator