This Wall Street Journal piece makes it clear that pressure from ACORN was a crucial element in the destruction of mortgage standards.

In view of the constitutional question about the authority of Congress to control and mandate health insurance, it’s worth asking what constitutional authority there is for all the government intervention in the housing market. Answer: no more than to intervene in health insurance. The drafters of the Constitution had a pretty good idea as to the matters where federal authority was appropriate and where it would only do harm, which is to say matters where coercive political meddling can only be harmful.

Unless you think that the political meddling with the housing market turned out well, maybe you should worry that political meddling with health care will be disastrous.