(CNN) — Majority Leader John Thune announced that the Senate will vote Thursday on a Republican-led alternative to Democrats’ three-year extension of soon-to-expire enhanced Affordable Care Act tax credits.

Neither bill, however, is expected to get the 60 votes needed to advance. Republicans have accused Democrats of a “show vote” with their proposal, and Democrats were quick to dismiss the GOP-led plan as a nonstarter.

Congress is up against the clock with the subsidies on track to expire at the end of the month amid the partisan stalemate , threatening to send premiums skyrocketing for millions of Americans.

Republicans have been under political pressure to coalesce around a plan ahead of the planned vote on the Democratic bill. Thune announced Tuesday that the Senate Republica

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