The Midterms in a Nutshell
What we must do over the next 4 and a half months
1. What’s needed for control of each chamber
In the Senate now: 53 Republicans - 47 Democrats (or independents who caucus with Dems). Democrats need to gain a net 4 seats to gain control of the Senate.
In the House now: 219 Republicans (or independents who caucus with GOP)- 212 Democrats. There are 4 vacancies (1 in a largely Republican district, 3 in largely Democratic districts). Assuming that none of the current vacancies flip party control in special elections before November, Democrats need to gain a net 3 seats to gain control of the House.
For more information Vulnerable Incumbents and Competitive Open Seats by state: