The federal prosecutor tasked with quarterbacking the Obama administration's high-profile case against Arizona's immigration law is no stranger to controversy or the limelight.

Justice Department attorney Tony West is a member of the so-called "Gitmo 9" -- a group of lawyers who have represented terror suspects.

West, the assistant attorney general for the department's Civil Division, once represented "American Taliban" John Walker Lindh, a controversial move that West feared would derail his political ambitions and helped delay his nomination to the department for three months in 2009...