They can have it as far as I’m concerned.
If California were no longer part of the United States, that would remove 50-odd electoral votes that have gone Democrat since 1992, and would guarantee a Republican majority in the House for the foreseeable future. The Senate could go either way.
Not that I blindly carry water for the Republicans — on many issues, I am actually closer to the Democrats — but as things have rattled out in the past 30 years, the Republican party is pro-life and the Democratic party is pro-choice.