Which condiment you favor when you lather your hot dog -- ketchup or mustard -- reveals your politics, according to a noted political scientist. "People who mostly or entirely use ketchup are much more likely to favor the invasion of Iraq than those who use mustard," says Dr. Noah Frum, a senior fellow at the prestigious Institute for Political Advantage think tank. "Red is an aggressive, war-like color, whereas yellow is much more passive and low-key, " he says. Dr. Frum conducted his study when one of the political parties, looking for an advantage in the upcoming November elections, came...