It doesn't ad up!

A controversial ad campaign featured in the Washington, D.C., metro area is comparing public school lunches across the country to what President Obama's daughters eat at their elite private school.

MyFOXDC.com reports that the ad, sponsored by Physicians Committee For Responsible Medicine, shows an eight-year-old girl speaking about the "healthy" vegetarian lunch choices Sasha and Malia Obama have at Sidwell Friends -- a Quaker private school in Northwest Washington, D.C.

The girl then asks, "Why don't I?"

The ad also claims that children in public schools are more likely to be fed meat and cheese products, according to the station.

While the ad is part of a campaign to petition Congress to require healthier foods in schools, Politico newspaper reports that "targeting" the Obama girls is no way to win friends at the White House.

"This is not the way to win the heart of the president," Brookings Institution Governance Studies Director Darrell West told Politico. "It's dangerous to target Obama's daughters because many people view family members as off limits for political advocacy. That's especially relevant in this case because his daughters are so young."