The Centralization vs Decentralization issue across the Atlantic

[Bono]

I've often thought of this.
Why is it that in the americans, right-wng parties generaly tend to favor most decentralization, while left-wing parties favor centralizing issues more, while in Europe the exact thing happens, with the right rarely favoring decentralization/devolution, etc? The only exceptiont to this in Europe I can find and the right wing regionalist parties, like Flemish Interest, Convergence and Union, or the Basque Nationalist Party, and the right in Switzerland. Is there any good explanation for this?