Politics is always in a state of flux, with old coalitions dissolving and new coalitions forming. Urban planning is likely to be one of the hot issues of the next decade, which will help to shape this realignment. Consider the case of Plano, a large affluent suburb of 288,000, north of Dallas.  The city government put together a plan to add high density housing near transit corridors, which is an increasingly popular trend in urban planning.  Texas is known as...