A political hurricane is gathering force - Howard Fineman - MSNBC.com: "We have journalist Malcolm Gladwell to thank for the idea that every social phenomenon has a dramatic 'tipping point.' It doesn't always work that way. And yet Hurricane Katrina is just such a moment. We are a big, strong country - and New Orleans will, somehow, survive - but you do get the sense, as President Bush finally arrived here after a month-long vacation, that a political hurricane is gathering force, and it's going to hit the capital any day. "