Republicans, under heavy pressure from the White House, are inching closer to passing a bill to repeal and replace parts of the Affordable Care Act, but possible revisions released Thursday may not clinch a deal. . . .

Yet House Republican leaders are playing down the likelihood that changes to the GOP health-care measure proposed by moderate Rep. Tom MacArthur (R-N.J.) would win over enough conservative and moderate holdouts, who have butted heads over removing some of the Affordable Care Act’s key insurance regulations.

“The question is whether it can get 216 votes in the House, and the answer isn’t clear at this time,” a senior GOP aide said. “There is no legislative text and, therefore, no agreement to do a whip count on.”