Not an issue to me. I am probably not registered to vote in the US and I won't vote. I rarely voted when I did live there since my vote never made a difference. If I do try to vote, I might run into a problem with California trying to tax me for "living" there. And, there is little chance that any vote I ever make in California would make the slightest difference in the outcome of any and all elections.
I just sit back and watch since it is simply not worth the effort nor the potential risk.
If you don't agree with the above in my case, please explain to me how my vote for the Libertarian candidate would matter in the outcome of any election in California or for the POTUS?
I just checked on eligibility to register and California requires you to be a resident of the state to register. No surprise there. I have not been a resident for 15 years.
https://www.sos.ca.gov/elections/frequently-asked-questions/
But then Google showed me this:
Can US expats vote?
Federal law provides American expatriates with the means for participating in their country's political processes. It requires states to permit U.S. citizens abroad to register and vote in presidential and congressional elections. Many states also permit absentee voting in state and local elections.
Still not worth the effort to me because of California's potential tax issues in California and the lack of effect when voting Libertarian.