Who's spending big, and where, in most expensive election cycle ever

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Spending for this year's midterms is accelerating as we get closer to Election Day. Political correspondent Lisa Desjardins makes sense of the billions spent to influence who controls Congress next year.

Lisa Desjardins is a correspondent for PBS News Hour, where she covers news from the U.S. Capitol while also traveling across the country to report on how decisions in Washington affect people where they live and work.

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