President Bush has picked quite a moment for his first trip as president to Israel, coming as it does in the wake of both the Annapolis peace parley and the challenge to his hard line on Iran issued by his own intelligence agency and promptly disputed by Jerusalem. The visit will have the potential to convey to Iran and its allies that there is no daylight between the American and Israeli positions on the crucial question of it acquiring nuclear weapons, even while tempting the president to get deeper involved in the so-called peace process.