WASHINGTON -- Tensions between the rich and poor are increasing and at their most intense level in nearly a quarter-century, a new survey shows. Americans now see more social conflict over wealth inequality than over the hot-button topics of immigration, race relations and age. The survey released Wednesday by the Pew Research Center highlights U.S. perceptions of the economic divide, an issue that has moved to the forefront in the 2012 presidential campaign amid stubbornly high unemployment, increasing poverty and protests by the Occupy movement.