“Maybe we can find out how many non-citizens voted in California”
The answer is simple....All of them!
When Ca. issued Driver’s licenses to illegals they were originally marked identifying them as such. Ca. has since removed the identifying marks and as illegal’s D.L. looks like any other. Match that with “Motor Voter” voter registration and you have millions of illegals voting.
There is huge voter fraud in Ca. Promoted by the Democrats it is no wonder it is a one party state.
And now it will get worse with the new "Voter Choice Act" that just took effect. Choice means that you get to choose how many times you vote. They are going to mail every registered voter a ballot 4 weeks before the "June 5" election. Then you can vote early at your choice of any of 16 Vote Centers starting May 25 or at your choice of 78 Vote Centers starting June 2.
When you come to a Vote Center, you can ask for and get a replacement ballot. If you are a registered voter but have "changed your name or address or signature" you can fill out a new registration form right there - note that this is not a "change of registration" form but a new registration. So this makes it easy for unscrupulous people (sometimes known as "Democrats") to vote multiple times and register multiple times. To some extent the election authority can reconcile things and identify duplicate ballots but that already takes them many weeks these days for absentee and provisional ballots and this will get far worse under this scheme. So this opens the door wide to fraud.
Tellingly, the first sentence on the notification card I just got in the mail to announce these "Improvements in the upcoming June 2018 Election" says: "Sacramento County Elections Office is offering you more opportunities for voting with the VOTERS CHOICE ACT." Note that it's not more options but more opportunities.