The emphasis remains squarely on the constantly-evolving story of the Brett Kavanaugh confirmation. But as the midterm elections draw nearer, hosts John Heilemann, Mark McKinnon, Alex Wagner and guest commentator Steve Schmidt delve into the ramifications of the confirmation's outcome on various Senate races around the country. Republicans and Democrats are riled up about this issue, and in states where the polls are close, Senate races could be affected by how the incumbents vote.

As the battle for the Senate heats up with post-Kavanaugh polls forecasting a Republican resurgence, The Circus travels the country charting the shifting dynamics in three of the closest races - each considered a must-win if Democrats hope to gain the majority. In Arizona, it's neck and neck between Kyrsten Sinema and Martha McSally; in Nevada, Jacky Rosen digs deep to take on incumbent Dean Heller; plus, a sit-down with North Dakota's Heidi Heitkamp, who's fighting for her political life in the wake of a campaign ad controversy.