There would appear to be no shortage of issues competing for Mark Zuckerberg’s attention. Security breaches. Russian disinformation campaigns. Politicians’ demands for more regulation. But the 34-year-old Facebook founder and CEO is also interested in a more local version of politics: He and wife Priscilla Chan have ponied up $1 million through their philanthropic Chan-Zuckerberg Initiative to support a statewide ballot measure that would soften penalties for drug possession.