Trump will get zero electoral votes from California whether a person can vote once or 100 times.
that;s not any reason to let this voting loop hole stay. It can be used to alter results of many other elections. Maybe you are self focused but Trump is not, he trys to help fix things that are wrong even if just for one person or if they do not effect him but effecting others.
But this sort of thing should directly lead to the disqualification of all of California's electoral votes - meaning no Democrat gets any, either.
Then listen to the screaming. :)