Washington — Republican moderates in the House revolted against leadership on Wednesday as they seek to force a vote on expiring health insurance premium tax credits — an issue that could have major political ramifications for the party in next year's elections.

Facing an end-of-year deadline, Republican Rep. Brian Fitzpatrick of Pennsylvania introduced a discharge petition to try to bring a bill to the floor that would extend the Affordable Care Act subsidies by two years. A handful of GOP moderates quickly signed on.

The move is the latest rebellion by rank-and-file Republicans to force votes on issues that leadership would rather avoid.

The underlying proposal, spearheaded by Fitzpatrick, would extend the tax credits through 2027 and impose a cap on income for those who are el

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