Too-easy credit and millions of bad loans made during the U.S. housing bubble paved the way for the financial calamity and Great Recession that followed. Today, by contrast, credit is too tight. Mortgage loans are particularly hard to get, creating a problem for the housing market and the broader economy.

In a normal time, I don't think economic policy makes a large difference one way or another. But in times of crisis it makes all the difference in the world.

Indeed, the FHA was born out of the Great Depression, which was also caused in significant part by a foreclosure crisis. Mortgages in the early 1930s were mostly three- to five-year 'bullet' loans, which did not amortize and were due in full at maturity.

The Bush tax cuts should be extended permanently for families with annual incomes of less than $250,000 and should be phased out slowly for those making more than that. Raising taxes on anyone now, when the economic recovery is so fragile, would be a mistake.

Housing was ground zero for the Great Recession. Between early 2006 and Obama's inauguration in 2009, average house prices fell by a third across the country. In certain areas, including cities as diverse as Akron, Orlando and Las Vegas, house prices fell by more than half.

I've done work for both Democrats and Republicans.

The key to house prices is the share of foreclosure or short sales in the total housing market. When that share rises, house prices will fall, because distressed properties sell for significantly less - currently around 25 percent below non-distressed houses.