There are two state house special elections Tuesday.
California
State Assembly District 18
There are 80 seats in the California State Assembly. The body is dominated by Democrats, who control 60 seats. This includes the vacancy that will be filled in Tuesday's special election.
The open District 18 seat is in the Oakland area, entirely within Alameda County. The vacancy was created in April when Democrat Rob Bonta resigned after being confirmed as California Attorney General.