The Dashboard is powered by a (feature layer) dataset. You can see the dataset here to download
https://election-results-ge2020-montcopa.hub.arcgis.com/datasets/montcopa::electionresults-ge20-dash...
Also, in general if you ever need to download a Feature Service from another government organization there are also tools like ArcGIS REST Service Export and the Hub Dataset page includes a link to the ArcGIS Service URL: https://services1.arcgis.com/kOChldNuKsox8qZD/arcgis/rest/services/ElectionResults_GE20_dashboard/Fe...
