The raw data behind the story "How The FiveThirtyEight Senate Forecast Model Works" https://fivethirtyeight.com/features/how-the-fivethirtyeight-senate-forecast-model-works/.
hist_senate_preds
A data frame with 207 rows representing US state elections and 5 variables:
Election
Year of election
Last name
Probability of winning election per FiveThirtyEight Election Day forecast
`Win` or `Loss`
See https://github.com/fivethirtyeight/data/tree/master/forecast-methodology