Dems definitely prefer MAIL IN VOTES and Christy Smith's promotional material specify that voters mail in their ballots! I note on Wikipedia, the Dem candidate has a photo and the Republican doesn't.
https://en.wikipedia.org/wiki/2020_California%27s_25th_congressional_district_special_election
Personally, I strenuously advocate against any CA congress candidate that Hillary supports!
I suggest 100’s of FREEPER informative ‘bombs’ on Christy Smith’s Twitter account.