Talk politics.

Common sense takes very little time to apply. A real investigation needs to be done, but to determine the who and why. This doesn't apply to the real investigation that needs to be done. This involves the administration and the president himself spinning a preposterous story for weeks to the electorate in order to limit the political damage. As you like to put it, "politicizing the tragedy." Obama's story wasn't plausible... it just wasn't. If there was intelligence telling him it was, then it could hardly be called intelligent, and Obama should have known better.