An expanded federal healthcare subsidy that grew out of the pandemic looks all but certain to expire on December 31, as Republican leaders in the United States faced a rebellion from within their own ranks.On Wednesday, four centrist Republicans in the House of Representatives broke with their party’s leadership to support a Democratic-backed extension for the healthcare subsidies under the Affordable Care Act (ACA), sometimes called “Obamacare”.Recommended Stories list of 3 itemsend of listBy a vote of 204 to 203, the House voted to stop the last-minute move by Democrats, aided by four Republicans, to force quick votes on a three-year extension of the Affordable Care Act subsidy.Democrats loudly protested, accusing Republican leadership of gavelling an end to the vote prematurely while some members were still trying to vote.“That’s outrageous,” Democratic Representative Jim McGovern of Massachusetts yelled at Republican leadership.Some of the 24 million Americans who buy their health insurance through the ACA programme could face sharply higher costs beginning on January 1 without action by Congress.Twenty-six House members had not yet voted – and some were actively trying to do so – when the House Republican leadership gavelled the vote closed on Wednesday. It is rare but not unprecedented for House leadership to cut a contested vote short.Democratic Representative Rosa DeLauro of Connecticut said the decision prevented some Democrats from voting.“Listen, it’s playing games when people’s lives are at stake,” DeLauro said. “They jettisoned it.”It was the …