Past century of government and economy
John Palmer has a look at the past 100 years of government and economic indicators:
This historical perspective visualizes economic trends and spending patterns, during good times and bad. Present-day assumptions regarding core party values have had major shifts over time, and the ridiculous extremes in voter alignment, lobbying, and legislative action are due for revision. As a basis for future shift, this data can educate a presumptive public, empowering citizens to make an informed decision on each and every election day.
I'm not so sure this would help you make a better informed decision as you vote, since the relationship between political party and economy is more complex than true and false. It's a good historical reference though.
What do you think of the graph overlays on top for GDP, debt, collections and CPI, with different vertical scales?