I was born in California. If Cali secedes, would I still be a US citizen if I don't live there?

Maybe we can be grandfathered in .

In reality yes, unless you give it up.

There's also a schism between Northern/Southern (Superior/Inferior) Cali. It can split into separate entities just as Texas can as they joined as Republics. Alaska was purchased by the Feds, hence can't do anything.

LOL no worries Greg I will sponsor you if all else fails!