Upon her arrival in the White House, First Lady Michelle Obama launched the “Let’s Move” campaign, encouraging healthier eating habits and reduced obesity rates — a campaign for which she formally unveiled the details Tuesday.

“The ultimate goal for ‘Let’s Move’ is to solve the problem of childhood obesity in a generation so that children born today grow up at a healthy weight with better notions of what is healthy, with better habits, who are incorporating exercise into their lives on a more regular basis,” the first lady said at last month’s Childhood Obesity Summit. 

The White House now even has its own food garden and hosts an outdoor farmer’s market every Thursday afternoon from May to November, making fresh produce from surrounding farmers available to city families. 

Yet just three blocks from the farmer’s market sits a McDonald’s fast food restaurant, just one of the 100 McDonald’s restaurants within 10 miles of Washington, D.C. And just as close sits K Street, home to hundreds of agribusiness, restaurant and beverage industry lobbyists bent on defending their clients from political efforts that could harm profit.

These industries have interests in a variety of issues, from immigration reform to free trade to energy and climate change. It’s a lobby also armed with massive resources to combat another government initiative — fundamental changes in food safety and labeling standards.