WASHINGTON — Republicans and Democrats in the Senate agree that health care costs are rising too quickly and expect to vote next week on legislation that could help Americans.

The only catch is that party leaders hadn’t decided as of Tuesday what to include in the bills.

Senators also seemed to accept that neither proposal will garner the bipartisan support needed to advance, leaving the tens of millions of Americans who purchase their health insurance from the Affordable Care Act marketplace with complicated decisions to make before open enrollment ends Dec. 15.

ACA marketplace plans are expected to increase by 26% on average next year, though a failure by Congress to extend enhanced tax credits would lead monthly payments for subsidized enrollees to increase by 114% on average, accord

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