Robert B. Reich had this commentary on marketplace:

Every Democratic candidate knows the only way out of this box is by growing the economy faster. That means that once the Democrats have selected a nominee, the big economic debate dividing Democrats and Republicans will be how best to grow the economy.

Republicans think you grow the economy by giving rich people tax breaks so they'll turn around and invest in new factories and equipment and research and development.

Of course he goes on to argue in favor of having the government decide how to spend people's money, but the Republican solution sounds good to me. At the same time, the two parties don't sound all that far apart.