These days, even free-market enthusiasts are talking about increased regulation of securities firms now that the Fed has shown that it will rush to their rescue if they get into trouble. But Mr. McCain is selling the same old snake oil, claiming that deregulation and tax cuts cure all ills.

Image Paul Krugman Credit... Fred R. Conrad/The New York Times

Hillary Clinton’s speech could not have been more different.

True, Mrs. Clinton’s suggestion that she might convene a high-level commission, including Alan Greenspan  who bears a lot of responsibility for this crisis  had echoes of the excessively comfortable relationship her husband’s administration developed with the investment industry. But the substance of her policy proposals on mortgages, like that of her health care plan, suggests a strong progressive sensibility.

Maybe the most notable contrast between Mr. McCain and Mrs. Clinton involves the problem of restructuring mortgages. Mr. McCain called for voluntary action on the part of lenders  that is, he proposed doing nothing. Mrs. Clinton wants a modern version of the Home Owners’ Loan Corporation, the New Deal institution that acquired the mortgages of people whose homes were worth less than their debts, then reduced payments to a level the homeowners could afford.

Finally, Barack Obama’s speech on the economy on Thursday followed the cautious pattern of his earlier statements on economic issues.

I was pleased that Mr. Obama came out strongly for broader financial regulation, which might help avert future crises. But his proposals for aid to the victims of the current crisis, though significant, are less sweeping than Mrs. Clinton’s: he wants to nudge private lenders into restructuring mortgages rather than having the government simply step in and get the job done.

Mr. Obama also continues to make permanent tax cuts  middle-class tax cuts, to be sure  a centerpiece of his economic plan. It’s not clear how he would pay both for these tax cuts and for initiatives like health care reform, so his tax-cut promises raise questions about how determined he really is to pursue a strongly progressive agenda.

All in all, the candidates’ positions on the mortgage crisis tell the same tale as their positions on health care: a tale that is seriously at odds with the way they’re often portrayed.