Sarah Palin canceled her Saturday appearance at a tea party rally in Indianola, Iowa, a person close the former Alaska governor told The Wall Street Journal. The person cited “continual lying” from event organizers at Tea Party of America, including a recent mixup over whether former U.S. Senate candidate Christine O’Donnell of Delaware would also speak. Ms. Palin is known for last-minute schedule changes that whipsaw supporters and media across the country. But the latest decision is puzzling. Ms. Palin’s speech at the rally was viewed as her most high-profile appearance of the summer, fueling speculation she was indeed plotting...