 At the conclusion of that day, when Mitt Romney had conceded to Barack Obama, Silver's model had correctly predicted the winner of every one of the 50 states and the District of Columbia.Silver, along with at least three academic-based analysts—Drew Linzer, Simon Jackman, and Josh Putnam—who also aggregated polls from multiple pollsters—thus was not only broadly correct about the election outcome, but also specifically predicted the outcomes for the nine "swing states".In contrast, individual pollsters were less successful.