The competition for Senator Dianne Feinstein's replacement is highly competitive, with three Democratic members of Congress garnering significant support among likely voters. On the Republican side, six candidates are gaining momentum.

However, there has been recent speculation about the potential candidacy of former California Governor Arnold Schwarzenegger.

For more, KCBS Radio news anchors Eric Thomas and Margie Shafer spoke with KCBS insider Phil Matier and former San Francisco Mayor Willie Brown.