Only 13% of the state's voting age population voted in primary elections two years ago.

ECONOMIST: Vermont��s Senate race

Along with the independents and Democrats, Mr McCain is also hoping to benefit from the 400, 000 veterans in the state, who make up 13% of the voting age population.

BBC: Republicans set for showdown

CNN's estimate of the number of Democrats in the voting age population as a whole indicates the sample is about 3 to 4 points more Democratic than the population as a whole, but also about 2 to 3 points more Republican than the population as a whole.

CNN: Poll: Debate watchers say Obama wins

Only 29% of the voting-age population bothered to vote at the last gubernatorial election.

ECONOMIST: A joke-spinning candidate with serious consequences

Out of a voting-age population of 2m, only 130, 000 caucused in 2004.

ECONOMIST: Iowa

This is troubling news for America, where the over-65 share of the voting-age population will rise from 17% now to 26% in 2030.

ECONOMIST: The next crisis

On the state level, the party has gone all out to register and educate the one-fifth of the voting-age population that's Latino, and the presidential candidates have courted them.

NPR: Latino Vote Focus of Nevada's Democratic Primary

According to the 2000 Census, Hispanics of voting age make up 10 percent of the population in Montgomery County.

CNN: Rising minorities find political clout elusive

Even though people who own gaming consoles are not representative of the general population (and many are not even of voting age), David Rothschild, an economist with Microsoft Research, geeks out over the possibility of using new weighting and de-biasing methods to extract more meaningful insights from his sample.

FORBES: Not Your Grandmother's Presidential Debate