The U.S. Senate has 51 Republicans and 49 Democrats (including two independents). There are 35 seats up in 2018 - including special elections in Minnesota and Mississippi - of which 26 are held by Democrats. That party will need to gain 2 seats to take control.

This 3-part Senate map lets you view the current Senate, make a forecast for the 2018 Senate elections, and see the composition of the 2019 Senate based on those predictions. Use the buttons below the map to share it on social media or embed it into a web page.