WASHINGTON — Senate Democrats are threatening to force a brief government shutdown this weekend to pressure Republicans to support policies they say match promises President-elect Donald Trump made on the campaign trail to help coal country and boost American manufacturers.

Government funding is set to run out at the end of Friday and lawmakers are currently considering a stopgap spending bill that would keep federal agencies funded through April 28. The angry Democrats are not threatening to block the spending measure, but to threaten to miss the Friday deadline in hopes they can entice Republicans into further negotiations.

The tension over the spending bill is a sign of the possible scrambled alliances to come when Trump is inaugurated and how they could prove to be a headache for Republican leaders.

The senator fighting to have more generous medical and pension benefits for retired coal miners included in the spending bill is West Virginia Democrat Joe Manchin III, whose state Trump won handily, in part, by promising to renew the coal industry. Manchin is one of several red state Democrats expected to face a tough reelection bid in 2018. He is set to meet with the president-elect at Trump Tower on Friday morning and it’s unclear whether they’ll discuss the issue. The Democratic senator has been floated as a possible member of Trump’s cabinet.

“I want to shut her down,” Manchin said Wednesday about the government, pointing to his anger over concerns about the miner provisions. “I mean this is ridiculous . . . You can’t throw 16,000 people out.”

About 12,500 former union miners and their families have been told their health benefits will lapse come Jan. 1, and an additional 10,000 are in danger of losing benefits at a later date. Many are also facing potential cuts to their retirement benefits due to declining coal companies being unable to make required contributions to pension funds.

Manchin is demanding a vote on an amendment to extend miners’ medical and pension benefits for one year.

Democrats are playing up the president-elect’s support for coal country.

Sen. Heidi Heitkamp, D-N.D., called out Trump by name as she left a Thursday meeting between Senate Minority Leader Harry M. Reid, D-Nev., and several of the Democrats who represents states where Trump won.

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