John McCain is running for reelection like it’s 2010.

The Arizona Republican has made his opposition to Obamacare — which dominated Senate races across the country six years ago — a central point of his campaign, by all accounts, the toughest reelection fight of his career.

He’s betting that shrinking coverage options and premium increases that could go as high as 65 percent if insurers get their way will resonate with Arizona voters, even as most of his Republican colleagues running this year have moved on to other issues.

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