(i) = incumbent
Until the filing period closes, candidates who have made gestures to a run are included. Some of these may not run, while others are likely to jump in.
In 2018, the election of Gil Cisneros to replace thirteen-term retiring congressman Ed Royce signified the magnitude of demographic and political changes in Orange County. These changes led to four seats in/part of the county flipping from a Republican representative to a Democratic Party one.
In 2020, Republicans hope to prove that 2018 was an aberration and are seeking a rematch in CD39. Running . . .