I’ve been stunned by the reception of “Obama’s Secret Iran Strategy.” In this, the era of the 140-character tweet, I’d assumed that a 9,500-word article would have scant appeal beyond a professional audience. Yet, to date, it has attracted 220,000 unique visitors; journalists from several different countries have called to interview me; I’ve done my share of talk radio; and senior political figures, including presidential hopefuls, have expressed their appreciation.