Gov. Jerry Brown signed California's Medicaid expansion bill into law in June 2013. Since then, the number of people enrolled in Medi-Cal, the state's version of Medicaid, has surged. Rich Pedroncelli/AP hide caption

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Maygan Rollins, a field organizer with Enroll America, talked health insurance options with Jerry Correa during a recent campaign in Miami. Lynne Sladky/AP hide caption

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The majority of what happens on Jan. 1, 2013, is tax increases and cuts in tax deductions to pay for the changes coming in 2014. hide caption

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