(CNN) -- Imagine 80-percent voter turnout in the United States.
Believe it or not, that was the actual statistic voting in the 2008 presidential election in one segment of the population, adults from families earning at least $100,000 a year.
On the flip side, the Census Bureau reports adults from families earning $20,000 or less a year had a 52-percent turnout.
Political scientists suggest the gap has to do with how much voters feel they have a stake. And also, how much they feel that their vote will actually influence change.
High income voters tend to lean Republican, though CNN exit polls showed that in 2008, Obama won over the majority of those earning $200,000 or more.
The latest Gallup poll shows high income voters returning to the Republican ticket with households earning less than $48,000 leaning Democrat.
That leaves the middle class still up for grabs.