Advisers and elected allies of Texas Gov. Rick Perry tell Whispers that the Republican will join the crowded field of presidential hopefuls by the end of August... Perry's entry will be a "game changer," said Mark Meckler, cofounder of the Tea Party Patriots, the nation's largest umbrella group for the movement. "It changes the equation because he has a record to run on." That record, added Meckler, is the "Texas miracle" of growth and economic prosperity.... Polls show substantial support for Perry. Gallup today has him winning in the South and within striking distance of leading the pack in the...