Stein became the presumptive Green Party nominee after winning two-thirds of California 's delegates in June 2012 . In a statement following the California election , Stein said , " Voters will not be forced to choose between two servants of Wall Street in the upcoming election . Now we know there will be a third candidate on the ballot who is a genuine champion of working people . " Stein won the presidential nomination of Green Party in July 14 , 2012 , at its nominating convention in Baltimore
nominating convention
2012 Green National Convention
Jill Stein 2012 presidential campaign