A rising tide sinks most boats
-- except during the Clinton years, when the economy started to right itself. And things held steady when JFK was in office.
This chart is the truest measure of whether a president was liberal or conservative; the "D" and "R" labels are much less reliable indicators.
The preceding paragraph may have been foolish, since the president does not have that
much impact on the economy. The choice of president does, however, reflect the prevailing zeitgeist.