Odds makers got 10 out of 11 right https://www.newsweek.com/election-betting-odds-accurate-prediction-us-presidential-election-1964752 The only one they've missed was 2016 In the 11 presidential elections since 1980, the only race where the winning candidate had worse odds than the losing candidate was in 2016, where both the betting markets and conventional polling failed to predict a Trump win.