Democrat incumbent Jim Costa and Republican Michael Maher are facing off for California's 21st District.Democrat incumbent Jim Costa and Republican Michael Maher are facing off for California's 21st District.Costa is hoping to keep his seat, which he won in 2022 after securing 54% of the vote against Maher.The 21st District covers most of Fresno and parts of Fresno and Tulare counties. Report a correction or typo