In the process, she underscored Obama's weakness with working-class white voters, a segment of the electorate that may prove pivotal in November.

CNN: The story

The segment is expected to stay flat for the next eight years, while white-collar services in education, health care and employee placement are predicted to add over 7 million jobs during the same period.

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But to win the White House, you need independent voters -- and they are not only the largest but the least religious segment of the electorate.

CNN: Picking Bachmann or Perry is risky for GOP