“As it looks beyond the elections of 2006, a Republican Party known for ideological solidarity is on the cusp of a far more searching philosophical battle than are the Democrats, historically accustomed to bruising fights over the finer points of political theory. The coming Republican brawl reflects the fact that President Bush will leave office with no obvious heir, and Bushism as a political philosophy has yet to establish itself in the way that Reaganism did.” E.J. Dionne previews the coming campaign for the soul of the GOP.