No shocker here, either. According to the Economic Report of the President, Democratic Presidents are better for the economy than Republican Presidents. Averaged and aggregated from 1959 to 2007. They even include a one year delay, to keep the numbers as valid as you can for this kind of study.
Analysis and explanation as well.
This follows on the heels of the McCain - Palin ticket spending all yesterday sounding very Democratic, blaming the fat cats on Wall Street for breaking trust with the American people.