The Democratic party had little to do with the financial meltdown. The banks failed because of the high risk mortgages that they lent. Investors bought mortgage backed securities and credit default swaps, which is essentially an insurance policy on their securities. Because these were labeled as swaps, they escaped the regulation of the insurance industry, which would have required the banks to have kept 10% of the capital they lent out. Thus, after the housing crisis led to more people defaulting on their mortgages, the mortgage backed securities began to fail, and the investors rushed to the banks in order to receive payment on their credit default swap, but the banks didn't have the capital they needed, thus they fell. That really has little to do with either political party for that matter. Regulation was in place, but the banks exploited a loophole in the system.