It makes sense to me. Historically, a lot of America's manufacturing has been either around the Great Lakes (i.e., the Rust Belt) or the mid-Atlantic / Georgia

It makes sense to me. Historically, a lot of America's manufacturing has been either around the Great Lakes (i.e., the Rust Belt) or the mid-Atlantic / Georgia (i.e., where manufacturing went after those states were able to undercut the Northeast / midwest on labor costs). I've never really thought of California as a major manufacturing hub.