According to OpenSecrets, part of the Center for Responsive Politics (CRP), it is estimated that the total cost of the 2022 midterm elections will exceed 16.7 billion U.S. dollars, becoming the most expensive one in U.S. history. As Mark Hanna，a U.S. election expert said one century ago:“There are two things that are important in U.S. politics. The first is money and I can't remember what the second one is.” 

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