ANN Coulter suffered a serious embarrassment over the weekend when her credit card was declined in Palm Beach. According to our spy, the nutty arch-conservative was caught at 9:45 p.m. Saturday night in the 10 Items or Less line at the local Publix when her card was rejected. “She was embarrassed but didn’t make a scene,” our witness said. “She just paid with cash and ran out of there. But at least she’s eating.”