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Democrat Mary Burke hopes to dislodge Wisconsin Gov. Scott Walker this year -- but her campaign isn't bringing up the clashes with Big Labor that made Walker a national household name. Burke's focus on economic issues, rather than labor, is a nod to Americans' increasing skepticism of the labor movement, experts say. "The expectation that labor will come roaring back and win this election single-handedly is just not realistic," says researcher Jake Rosenfeld.

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