Healthcare is a headache for GOP candidates in California

To win the Republican primary, the three Senate hopefuls must bash the plan signed by Obama. Against Boxer in the fall, the nominee will have to adopt a more moderate stance.

Republican candidates across the nation are confident that opposition to President Obama's healthcare law will deliver them electoral victories. But in California, the three GOP Senate candidates vying to take on Sen. Barbara Boxer face a much more daunting task: convincing a majority of Californians who support the bill that they are wrong.