ALLENTOWN, Pa. — Republicans in key battleground U.S. House districts are working to contain the political fallout that may come when thousands of their constituents face higher bills for health insurance coverage obtained through the Affordable Care Act.

For a critical sliver of the Republican majority, the impending expiration of what are called enhanced premium tax credits after Dec. 31 is a pressing concern as they potentially face headwinds in a 2026 midterm election that will be critical to President Donald Trump’s agenda.

One of those is first-term U.S. Rep. Ryan Mackenzie, R-Pa., whose victory for the Allentown-area seat last year was among the narrowest in the nation.

Mackenzie is part of a bipartisan group that has been pressing for an eleventh-hour compromise, advocating for

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