The 2018 midterms will feature over 500 races for federal office and governor's mansions, let alone thousands of others for state and local office. Democrats are in a strong position to take back the House and still have hopes of regaining their majority in the United States Senate and winning a number of governorships. But there are still over 50 days before election day and recent years are filled with countless examples of political upsets in American elections.

These key races represent a slice of some of the most competitive and compelling contests in November. Although by no means an exhaustive list of the races that will determine the political complexion of the next few years, this gives a sampling of those for the House, for the Senate and for governorships that observers will be paying to on election day