I’ve put up one more Texas race: Mike Siegel in TX–10, who is repeating his 2018 challenge to Michael McCaul. He lost by 4 in 2018, without getting much attention. He’s a Bernie liberal.
We may still be a cycle or two early, but Texas is where we can pick up significant numbers of seats. There just aren’t many Republicans in California to toss out any more. Texas CDs 3, 10, 21, 22, 23, 24 are all highly competitive (Lean R or better). TX–02, already up, is one of several that can flip on a good night.
If you can, there are many state legislature races looking for small amounts of money. Look for lists from Daily Kos or Democratic Party sources.