Who did create the sub-prime mortgage debacle?
Bush warned Congress years before it happened.
Folks like Barney Frwank and Chris Dodd ignored him.
When the Dems took over Jan of 07 they tightened lending regulations. Up until that point anyone could get a loan with no qualifications under the Sub-prime program using "Stated Income" as a qualification. I was a loan officer during in the period leading up to the housing debacle so I know what was going on.
I remember seeing families that couldn't afford to pay their rent moving into mansions and trashing the place, living rent free, then just leaving the place a mess. This was going on all over the country. Somebody told them they could get away with it, so they did it.
Some people that obtained ARM loans during the period before 07 needed to refinance to avoid massive increases in their payments and found they no-longer qualified for the home they lived in. So many of them defaulted and just walked away from their mortgages. People that need these types of programs even to qualify for a loan in the first place due to bad credit did what they always do, they shirked their responsibility.
A lack of accountability is the primary cause of the sub-prime crisis.