LOS ANGELES (AP) — Gov. Jerry Brown heads into Tuesday’s gubernatorial primary with a huge lead, while his top two Republican challengers have pulled into a dead heat, according to a poll released Sunday.

Fifty percent of likely voters say they will cast ballots for the Democratic incumbent in the open primary, with 18 percent supporting Republican businessman Neel Kashkari and 13 percent favoring state Assemblyman Tim Donnelly. The split between Kashkari and his fellow Republican is within the poll’s margin of error.