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Democratic presidential candidate Hillary Rodham Clinton looks on as she is introduced to speak during a campaign stop at Uncle Nancy's Coffee House, Sunday, Sept. 6, 2015, in Newton, Iowa. (AP Photo/Charlie Neibergall)

Democratic presidential candidate, Sen. Bernie Sanders, I-Vt., speaks during a television interview before a town hall meeting, Thursday, Sept. 3, 2015, in Grinnell, Iowa. (AP Photo/Charlie Neibergall)
Democratic presidential candidate Hillary Rodham Clinton looks on as she is introduced to speak during a campaign stop at Uncle Nancy's Coffee House, Sunday, Sept. 6, 2015, in Newton, Iowa. (AP Photo/Charlie Neibergall)

Democratic presidential candidate, Sen. Bernie Sanders, I-Vt., speaks during a television interview before a town hall meeting, Thursday, Sept. 3, 2015, in Grinnell, Iowa. (AP Photo/Charlie Neibergall)

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    Sanders drawing sharper contrasts with Clinton

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Sanders drawing sharper contrasts with Clinton

After months of playing nice, Bernie Sanders is starting to go after Hillary Clinton on policy differences... but will it be enough to stabilize his lead?

Sanders drawing sharper contrasts with Clinton

After months of playing nice, Bernie Sanders is starting to go after Hillary Clinton on policy differences... but will it be enough to stabilize his lead?