USATODAY.com - As moderate candidates disappear, so do voters

The number of Republicans who are more liberal and Democrats who are more conservative than their respective party colleagues has been a shrinking pool for more than a decade.

The growing partisan divide comes at the expense of independent voters, who now outnumber those who consider themselves Republicans or Democrats, according to many polls.

Little wonder that turnout at the polls is at historic lows, with just three in 10 eligible voters expected to cast ballots on Election Day.

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