This Ambinder post from a few days ago is presumably no longer operative:
There is a reason why Obama hasn’t given a public statement. It’s strategy.
Here’s the theory: a two-bit mook is sent by Al Qaeda to do a dastardly deed. He winds up neutering himself. Literally.
Authorities respond appropriately; the president (as this president is wont to to) presides over the federal response. His senior aides speak for him, letting reporters know that he’s videoconferencing regularly, that he’s ordering a review of terrorist watch lists, that he’s discoursing with his secretary of Homeland Security.
But an in-person Obama statement isn’t needed; Indeed, a message expressing command, control, outrage and anger might elevate the importance of the deed, would generate panic (because Obama usually DOESN’T talk about the specifics of cases like this, and so him deciding to do so would cue the American people to respond in a way that exacerbates the situation).
Obama of course will say something at some point. Had the terrorist blown up the plane, it’s safe to assume that Obama would no longer be in Hawaii. In either case, the public will need presidential fortification at some point. But Obama is willing to risk the accusation that he is “soft” on terrorism or is hovering above it all, or is just not to be bothered (his “head’s in the sand,” or “golfing comes first”) in order to advance what he believes is the proper collective response to a failed act of terrorism.
Let the authorities do their work. Don’t presume; don’t panic the country; don’t chest-thump, prejudge, interfere, politicize (in an international sense), don’t give Al Qaeda (or whomever) a symbolic victory; resist the urge to open the old playbook and run a familiar play.
In a sense, he is projecting his calm on the American people . . .