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Democratic Presidential candidate Hillary Clinton (L) and U.S. Sen Elizabeth Warren (D-MA) (R) wave to the crowd before a campaign rally at the Cincinnati Museum Center at Union Terminal June 27, 2016 in Cincinnati, Ohio. Warren is helping Clinton campaign in Ohio.
Democratic Presidential candidate Hillary Clinton (L) and U.S. Sen Elizabeth Warren (D-MA) (R) wave to the crowd before a campaign rally at the Cincinnati Museum Center at Union Terminal June 27, 2016 in Cincinnati, Ohio. Warren is helping Clinton campaign in Ohio.

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    Elizabeth Warren joins Clinton to attack Donald Trump

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Elizabeth Warren joins Clinton to attack Donald Trump

Sen. Elizabeth Warren joined presumptive Democratic presidential nominee Hillary Clinton on the campaign trail and had some pointed words for Donald Trump. CNN's Jeff Zeleny reports.

Elizabeth Warren joins Clinton to attack Donald Trump

Sen. Elizabeth Warren joined presumptive Democratic presidential nominee Hillary Clinton on the campaign trail and had some pointed words for Donald Trump. CNN's Jeff Zeleny reports.