A nonpartisan fact tank that informs the public about the issues, attitudes and trends shaping the world.
Major news source covering Congress, U.S. politics, policy debates, elections.
Venerable news source covering Congress and Capitol Hill. You can also browse archived issues (archives are a Princeton-subscription resource).
Provides informed analysis of election polling as well as a model that aggregates a multitude of polls to forecast the election.
Another sophisticated forecasting model that generates thousands of simulations to estimate the probability of Congressional control. See also their midterm news coverage for a take on U.S. politics from across the pond.