Because Democrats think in terms of programs, policies, and particular pieces of legislation. It’s easy to reverse course by compromising more and giving up on legislative goals. Bill Clinton never mentioned the words “health care reform” after the 1994 midterms.
Republicans think in terms of simple ideas, themes, and movements. It’s far harder to reverse course on these (look what happened to the first George Bush when he raised taxes), and easier to keep them alive: Republican presidents just continue looking for opportunities to implement them.
Republicans are also more disciplined (ask yourself which party attracts authoritarian personalities and which attracts anti-authoritarians). This makes it easier for them to stay the course. Their base continues to organize and fulminate even after midterm defeats. Democrats, on the other hand, are less organized. Electoral defeats tend to fracture and dissipate whatever organization they have.
Republicans are cynical about politics from the jump. Political cynicism fuels them. Democrats are idealistic about politics. When they become cynical they tend to drop out.
Robert Reich, in un interessante articolo sull’Huffington Post su quello che potrebbe succedere dopo le elezioni di metà mandato che si terranno tra pochi giorni negli Stati Uniti.
Qui si parla di politica americana, ma la descrizione dei due partiti non è poi così diversa da quella che si potrebbe dare per le nostre destra e sinistra.