O commented on an ongoing investigation, which is newsworthy, although he has also done it it too often in the past. And he called it an “investigation,” not a routine “security review.” He praised her spectacular job performance as SOS, and her sterling intentions. Why, they are proof she didn’t really do anything wrong! Maybe an innocent mistake ...
His statement gives him plausible deniability. He can be shocked Shocked SHOCKED to learn what was going on at the State Department. AFAIK, the Obamas and Clintons still hate each other. But Obama obviously can't be seen as anything but supportive of the Democrat front runner in public. (This theory is consistent with Bubba's recent spontaneous statements about the last 8 years when he's off the reservation/off his meds.)