SAN ANTONIO

Channeling her inner Cheney, Hillary Clinton dropped a fear bomb, as Michelle Obama might call it, implying in a new ad that if her opponent is elected, your angelic, innocent, sleeping children could die in a terrorist attack.

Only she has the wise head to go nuclear, should that Strangelovian phone call from a power-mad Putin come into the White House at 3 a.m. Her ad shows how composed she would be at the dread moment when she picks up the phone. Her nuke look is feminine, in a tailored camel-colored jacket and gold necklace, yet serious, in Tina Fey black reading glasses.

It’s hard to discern the message of the ad. The scariest thing is not the persistently ringing phone but an Andrea Yates-looking mother who’s creeping up on the sleeping babes in the dark. The point can’t be that Hillary is superior to Obama in international crisis management, because she’s done no more of it than he has. She’s only done domestic crisis management, cleaning up after Frisky Bill.

Is the message that Hillary is Ready on Night One? That she won’t have to waste any time if she’s rousted out of bed in the wee hours, because she’s wearing a pantsuit under her pantsuit? (Or is it just, as Wesley Clark said during an appearance with her in Waco on Friday, that Hillary’s “been in the White House when the tough decisions were made. I guess you’ve been at the bedside when that phone rang at 3 a.m.”)