Your analogy assumes the same SIZE of car which is incorrect. Romney will NOT be opposed by the party and will in fact, because he is supported by the GOP-e, USE the party to force acceptance of his form of socialism. Thus it is either 4 years of an opposed Obama or 8 years of an unopposed Romney.
So the correct analogy is: Which is easier to stop and reverse, a fast car or a slow semi?
You aren’t too good with analogies are you?