A new analysis of political signs displayed at a tea party rally in Washington last month reveals that the vast majority of activists expressed narrow concerns about the government's economic and spending policies and steered clear of the racially charged anti-Obama messages that have helped define some media coverage of such events. Emily Ekins, a graduate student at UCLA, conducted the survey at the 9/12 Taxpayer March on Washington last month by scouring the crowd, row by row and hour by hour, and taking a picture of every sign she passed. Ekins photographed about 250 signs, and more than half...