https://betdata.io/historical-odds/us-presidential-election-2020-winning-party
US Presidential Election 2020 - Winning Party historical betting odds - BetData
Historical betting odds for US Presidential Election 2020 - Winning Party - 130,751 data points from 2019-09-18 to 2020-12-15
us presidential electionbetting oddswinningpartyhistorical