Millions of voters are heading to the polls today as 15 states are holding primaries and caucuses in what’s known as Super Tuesday. In California, there is a four-way race to fill the seat of the late Senator Dianne Feinstein. Three Democratic congressmembers — Adam Schiff, Katie Porter and Barbara Lee — are on the ballot along with Republican Steve Garvey, a former Major League Baseball player. The top two candidates, regardless of party, will face off in November.