Is the Unpopularity of President Biden’s Agenda Reflective That He Won 81 Million Votes in 2020 or Closer to 65 Million?

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Biden in 2020 ran on the “progressive” agenda which he’s trying to implement as president, meeting stiff resistance, so isn’t the failure of Biden’s agenda reflective of his having received only about 65 million (legitimate) votes rather than the 81 million which would indicate a mandate for his policies?