On October 24, former California Governor Arnold Schwarzenegger spoke at the University of Southern California. He said he cast a write-in vote for president in November 2016, for Ohio Governor John Kasich.
This is very ironic, because Schwarzenegger is responsible for removing write-in space in California general elections for Congress and partisan state office, and attorneys associated with him vigorously intervened in court to defend that write-in ban.
See the Politico California Playbook for October 26 at this link. Scroll down to the middle for the Scharzenegger story, which is titled, “Playbook Excloo: Our Talk with Arnold.”