Michael Gerson has an odd sense of time.  Read the the following paragraph closely:

Holder launched his tenure by showing disdain for the work of career federal prosecutors when it fit his ideological predispositions. In 2004, a task force from the Eastern District of Virginia investigated allegations of misconduct against the CIA and found insufficient evidence of criminal conduct or intent. Holder ignored the views of these respected prosecutors and appointed his own special prosecutor, appeasing a political constituency that wanted the CIA to be hounded and punished. As a result, morale at a front-line agency in the war on terrorism has plunged. What possible reason could a bright, ambitious intelligence professional have to pursue a career in counterterrorism when the attorney general of the United States is stubbornly intent on exposing and undermining his colleagues?

In 2004 George W.Bush had not yet begun his second term of office.  That was five years ago.  Something seemed odd to me about this argument, so I googled it.  If you Google the phrase "2004 task force Eastern District" you get an article from the Weekly Standard on Holder's "witch hunt".

Without many added premises about how the 2004 inquiry resolves any future allegations of torture, Gerson cannot possibly expect us to draw the conclusion that Holder is "intent on exposing and undermining his colleagues."  If crimes were committed subsequent to 2004, then that is another matter.  It's not an insult to suggest that his colleagues failed to stop future crimes.