Political Party Impact on the Economy

There has been a continuing debate over which political party benefits the economy the best.  The Republicans claim that their free market ideology effects the economy best while the democrats pro-government over-site ideology is best.  I plan on taking the top economic indicators (gross domestic product, gdp per capita, etc.) and comparing them to the party affiliation of the House of Representatives, Senate, and President (using a dummy variable to tell whether they are Republican or Democrat.)  I'll then put all of the data into one and compare all four regressions.