We do not know a lot about what is in the health care bill that Republicans are trying to rush through the Senate, but what we do know suggests it will be as bad or worse than the dreadful legislation that the House passed in May.

The Senate majority leader, Mitch McConnell, is doing everything he can to keep the public in the dark about his plan to undo major provisions of the Affordable Care Act, or Obamacare. But Washington being Washington, a few details have become public. All are alarming and depressing. And as they emerge, and the public unveiling of the bill grows closer — it could come on Thursday — the need for a few wise Republicans to stand with Senate Democrats to say “no” becomes ever more urgent.

One provision under consideration in the Senate, according to news reports, would reduce federal spending on Medicaid more than the Dickensian House version does. That would put even more pressure on states to reduce care for the nearly 75 million people who benefit from that program.

Another change would make it much easier for states to let insurance companies sell policies that do not cover treatments like chemotherapy or drugs like insulin, leaving people with pre-existing health problems and those who become sick worse off.