Illinois Gov. Bruce Rauner (R) signed a bill in August making pumpkin pie the official state pie. But climate change -- which Rauner has not publicly acknowledged is a thing -- may be a big part of the reason that some Thanksgiving tables lack the holiday classic this year. The canned food industry expects pumpkin yields to be down by as much as half for 2015 due to high rainfall this summer in Illinois, where 85 percent of pumpkins consumed in the U.S.