Senate Control in 2014 Increasingly Looks Like a Tossup

The chart below reflects our current overview of the Senate landscape, including the probability estimates. (The estimates are not based strictly on a formula but instead are best guesses, accounting for the partisan lean of each state, the quality of the prospective candidates, and approval-rating or polling data to the extent that it might be informative.) When we last conducted this exercise in February, our projection was for Republicans to win between 49 and 50 Senate seats, meaning that their standing has improved by about one seat since then.

Nate Silver
NYT
7/16/13