The 33rd Senate District falls entirely within the boundaries of Los Angeles County. Lena Gonzalez (D) won a special election in 2019 to win the seat (Ricardo resigned to assume another office).
This district shows the following party registration for the three largest political groups (the source is http://www.l2political.com):
Unsurprisingly, in a race with this kind of registration gap, no Republican filed for the seat. Gonzalez will win re-election by default.