California’s Obamacare premiums will jump 13.2 percent on average next year, a sharp increase that is likely to reverberate nationwide in an election year.

The Covered California exchange had won plaudits by negotiating 4 percent average rate increases in its first two years. But that feat couldn’t be repeated for 2017, as overall medical costs continue to climb and two federal programs that help insurers with expensive claims are set to expire this year.

The increase announced Tuesday comes as major insurers around the country seek even bigger rate hikes for open enrollment this fall, and the presidential candidates clash over the future of President Barack Obama’s landmark health law.

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