Apparently, you're unaware that Republicans held the governorship the eight years before Romney took office.
Or that Romney's failures were so great that the Republican party held less seats in the Massachusetts legislation after he was done than at any time since the civil war. That is a sneak peak as to what will happen to the Republican party nationally if he is elected.
I am not unaware of any of the facts you have unnecessarily recited. I allowed for them when I used the term “rare” and didn’t use a term like “unprecedented”.
Careful reading is a valuable life skill.