A must-pass House spending bill aims to stop the Census bureau from changing the way it surveys health insurance coverage.
Conservatives have blasted the change, announced by the Census this year, as an attempt to distort data on the effects of ObamaCare. The change will likely result in fewer people being counted as lacking health insurance this year.
The Census said the change to its Current Population Survey was based on science and was a long time in coming.
But conservative lawmakers and activists say the change will make ObamaCare look more effective than it has really been.
The 2105 Commerce, Justice, Science spending bill being marked up in subcommittee on Wednesday has a provision to stop the change.
It conditions funding for the Census on it using the same questions for the survey that it has previously used.