I think the mortgage crisis was caused by the fact people who have no health insurance were forced into court by the collection agencies and had to pay up, therefor leaving no money to pay the mortgage.....I would think if you could afford expensive health insurance, you would be able to make your mortgage payments so that would eliminate them and the rest are just waiting until something happens to them.
The causes for the mortgage/housing crisis are not complicated. Liberalized changes in Fannie/Freddie by the Clinton administration allowed government guarantees for high risk sub prime loans, the risky loans became epidemic. Attempts to fix this (regulate/oversee) were blocked by Democrats because they were afraid it would hurt poor people trying to buy homes.
Democrats in blocking these needed regulations are on record denying problems existed with Fannie/Freddie. This is a winning election issue for Republicans, they need to start explaining this as soon as the bailout is passed.