Though Starbucks bucked the trend by reporting same-restaurant sales growth in the U.S., the latest quarter's 4% increase disappointed investors as it ended a streak of 25 straight quarters of domestic comparable-store sales growth of 5% or greater. Fast-food operator Wendy's (WEN) complained about consumers' moods as well, and blamed stalling wages and rising living costs for hurting consumer spending. CEO Todd Penegor said the 2016 presidential race was also a factor, as consumers are "a little uncertain around their future and really trying to figure out what this election cycle really means to them." The pain was widespread among dining's heaviest hitters. McDonald's (MCD) U.S. sales growth was slower than expected in the latest quarter, while burrito chain Chiptole (CMG) continues to face sales woes in the wake of a food-safety crisis last year.