The health-care ruling has exposed a delicate dance within the Republican Party. Romney does not want to run on the health-care issue. To the extent that he wants to invoke the issue, it's to flay Obama for having focused on it as a distraction from the economy, not as an ideological crusade against Big Government. But conservative activists want to be sure that, if Romney wins, he will commit his political capital to repealing the Affordable Care Act.

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