Upper Deck has confirmed that the World of Politics inserts found in 2011 Upper Deck World of Sports also come with variations. Each of the nine cards in the set come with a second version featuring the politician eating a meal or having a snack on the road. In Michele Bachmann's case, it looks as though she's ready to autograph a corn dog. Yum!
Upper Deck confirmed the variations fall one per hobby case. They're even harder to find in retail packs. Looking at current and past auctions on eBay, a casual observation looks as though 10-20% of the cards are variations. However, the sample size is too small to get a definitive gauge.
Here's a complete side-by-side gallery of both the regular World of Politics cards and the Food Variations.
2011 Upper Deck World of Sports World of Politics Gallery and Variations