(CNN) — After days of real progress in bipartisan talks to end the government shutdown, the Senate now appears to be heading — for now — toward another dead end.

The status of the Senate’s negotiations continue to change by the hour. But as of Thursday night, Senate Democrats signaled they were prepared to block GOP plans to force a Friday vote to reopen the government — until they got more commitments on dealing with rising health care costs.

That again scrambles the plans of Senate GOP leaders, who had signaled they would soon hold votes on a newly drafted bill to reopen the government, which had been written with input from some Democrats. But that emerging deal did not include any firm commitments to resolve the expiring Affordable Care Act subsidies issue at the heart of the shutdow

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