Even Attorney General Eric Holder calls it “controversial” — his decision to appoint a special prosecutor to look into prisoner abuse cases involving CIA interrogators and contractors. BUSH

He picked career federal prosecutor John Durham, who was already investigating the CIA’s destruction of interrogation videotapes. While he’s not exactly a  household name, the investigation has only just begun.

Other former special prosecutors were relatively obscure at the start and then launched into the limelight — remember Ken Starr of the Clinton-Lewinsky scandal and Patrick Fitzgerald who investigated the outing of Valerie Plame.

The White House says President Barack Obama, who previously said he wanted to look forward not backward, had left the decision of going the special prosecutor route totally up to Holder.

Supporters of the investigation see it as a way for the United States to regain the moral high ground on torture issues. Opponents say it makes the United States look weak and will make the CIA more risk-averse and hurt national security.