The new 270toWin Senate election simulator assesses the likelihood of Senate control based on the probabilities in each race.    As guidance for users, we start with the average of the probabilities calculated by the respective New York Times and Washington Post Senate forecast models.    

The real value-add here is that users can adjust those probabilities as they see fit, with each adjustment recalculating the overall probability.     There is also an option to run single simulations, similar to a popular presidential feature we have on the site.

Like other 270toWin features, the goal here is to actively engage users by providing tools to enable them to make their own election forecasts.