Democrats on the Senate’s health committee are asking the Trump administration and the House GOP to drop the lawsuit against ObamaCare’s insurer payments. 

The payments, called cost-sharing reductions, reimburse insurers for giving discounted deductibles to low-income ObamaCare enrollees and have been the subject of a lawsuit filed by House Republicans, who argue the payments were being made unconstitutionally. 

Speaker Paul Ryan (R-Wis.) said Thursday that the administration would continue to fund the payments to insurers while a House lawsuit ran its course. 

But the Democrats on the Senate Health, Education, Labor and Pensions Committee argue the lawsuit needs to be dropped. 

{mosads}”Failing to take immediate action to oppose the lawsuit or direct House Republicans to forgo this effort will increase instability in the insurance market, as insurers may choose not to participate in the marketplace in 2018,” Democratic Sens. Tammy Baldwin (Wis.), Sheldon Whitehouse (R.I.), Elizabeth Warren (Mass.), Maggie Hassan (N.H.) and Chris Murphy (Conn.) wrote in a letter to President Trump. 

“We remained concerned that your administration has still not provided certainty to insurers and consumers that you will protect the cost-sharing subsidies provided under the law.” 

Insurers have been concerned that the Trump administration would not continue the payments and have threatened to drop out of the market for 2018 or increase premiums if they don’t get them. 

But they did not find Ryan’s comments last week reassuring. A spokesperson for America’s Health Insurance Plans (AHIP) told The Hill last week that insurers are still worried the payments could be discontinued.

AHIP wants Congress to appropriate the money for 2018 or provide some other guarantee that the payments won’t be discontinued.