For obvious reasons, this argument is very popular on the right, but there’s precious little to back it up. The core claim can be a bit slippery, but it tends to go something like this: the existence and affordability goals of Fannie Mae and Freddie Mac (the GSEs) and the Community Reinvestment Act (CRA) were a major reason we had a subprime-driven housing bubble and then a crash. The only problem? Pretty much all the evidence on the housing crisis shows that that’s not true.
worth a read.