Feinstein wins all except Imperial and Modoc.
Why would Modoc vote for de Leon? Will Republicans stay home? Are Modoc Democrats extremely liberal?
Protest R votes. Modoc is also a Tea Party type county not a business conservative type county so they really hate Feinstein.
Would Modoc Republicans really turn out for a D vs. D race?
Look at CA Sen 2016 for that answer the turnout in that race was garbage but in the presidential there were plenty of votes cast
This.
There were something like 30% fewer votes cast for senate than prez in 2016 for Modoc and Lassen Counties.