What are Harris' odds to win if she wins Pennsylvania? If Trump takes Georgia?
Yesterday, 538 unveiled our county benchmarks for the 2024 election. The benchmarks are one of the tools our reporters have used on election nights internally to spot early trends in results and see who's on track for victory. Another is our hypothetical election simulator, which enables users to pick winners in each state and see how your calls update our pre-election presidential election forecast.
For example, while our model starts off giving Kamala Harris a 50-in-100 chance of winning the election, if you call Pennsylvania for her, her chance of winning the majority of Electoral College votes rises to 87 in 100. Add Wisconsin and she's a 94-in-100 favorite. Trump, meanwhile, has a solid Pennsylvania-plus-Sun Belt path to victory. If we assign Michigan and Wisconsin to Harris, but give Pennsylvania and Georgia to Trump, the former President wins 62% of the time.
I will personally be running a version of our what-if simulator throughout election night and reporting the results for you here on this live-blog. That version is a little closer to what you'd get in a full live election night model — it updates our pre-election model not with binary calls about who will win or lose, but with projections in each state from various other sources and models — but we're keeping it on my laptop as a test for future elections.
Our "what-if?" simulator is pretty much an empirical replica of what you'll see anchors and reporters doing on television all night, though. If you take X away from Y, what happens in Z? If Trump is beating his polls in three fast-counting east coast states, is he on track out west, too? Plug your guesses into our interactive as the night goes on and you can figure it out!