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DALLAS (CBSDFW.COM/AP) — Hillary Rodham Clinton’s campaign is launching a new offensive on taxes, saying Bernie Sanders’ health care plan would require middle-class workers to pay higher taxes.

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Clinton campaign spokesman Brian Fallon says in a statement that a 2013 proposal by Sanders in the Senate to create a single-payer health care system showed middle-class families would face higher taxes. He says “simple math” shows Sanders would need to tax workers more to pay for his agenda.

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Sanders campaign spokesman Michael Briggs says their “Medicare for all” plan would save taxpayers money in the long run because it would eliminate wasteful health spending. He says Clinton supports a system that “props up private insurance companies and pharmaceutical companies” which have given money to her campaign.

Clinton is taking part in a grassroots organizing event today in Dallas. The event, where Clinton hopes to organize support ahead of the March 1 Texas Primary, is being held in the Mountain View College gymnasium at 849 W. Illinois Avenue, Dallas, Texas 75211.

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