The Washington Post's Greg Sargent writes:

The other day, the consulting company McKinsey released a startling study claiming that 30 percent of employers are planning to stop giving health insurance to their workers as a result of the Affordable Care Act. The study received a good deal of press coverage and was widely bandied about by conservative politicians and media outlets as proof that conservative warnings about the law are coming to pass.

But as a number of critics were quick to point out, McKinsey's finding is at odds with many other studies — and the company did not release key portions of the study's methodology, making it impossible to evaluate the study's validity.

There's now been a new twist in this story.

I'm told that the White House, as well as top Democrats on key House and Senate committees, have privately contacted McKinsey to ask for details on the study's methodology. According to an Obama administration official and a source on the House Ways and Means Committee, the company refused.

Read the whole thing.