What considerations, political or otherwise, prompted members of Mr. Bush's staff to believe that Al-Arian was the kind of person they wanted on their team? Who bears responsibility for making those calculations? And are they continuing to do so with respect to other individuals and organizations that could, at the very least, embarrass Mr. Bush and, at worst, seriously undermine his efforts in the war on terror? What are we to make of the fact that a Muslim extremist (or "Islamist") named Dr. Sami Al-Arian was arrested and indicted last week on 50 counts, among them conspiracy to finance terrorist...