House Dem: GOP doing 'bidding of polluting industries'

She added, for the record, that, "To so blatantly be doing the bidding of the polluting industries is simply mind-boggling. If the data is not going to be provided to industry, either directly or indirectly, members need to know to whom you will be sending it.”

The resolution would allow the committee chairman to issue subpoenas “for any and all research data, information, documents and other records" used in certain studies and to make that information available to the public. The EPA, though, does not itself possess that data.

Democrats are concerned the move could violate federal privacy laws by identifying personal health information about people who participated in the studies. Republicans said such records would be "de-identified" once released into the public sphere.

"During the meeting, Chairman Smith made clear that any personal health information that is in the data will be protected and removed before the data is made public. But he also made clear that the American people and American taxpayers who funded these studies have a right to see the information and determine whether the EPA is basing its regulations on sound science," a GOP committee aide told The Hill in an email.

The overall measure speaks to larger concerns Republicans have about transparency at the EPA.

“It is irresponsible that a federal agency supported by taxpayer dollars has refused to hand over this data,” Rep. Larry BucshonLarry BucshonA guide to the committees: House Republicans who oppose, support Trump refugee order Overnight Tech: Trump meets Alibaba founder | Uber to make some data public | GOP Lawmakers tapped for key tech panels MORE (R-Ind.) said during the markup.

Smith defended the resolution, saying that, “There are any number of scientists and scientific organizations who are interested in looking at the data and engaging in their own independent analysis.”

Rep. Alan GraysonAlan GraysonWhy Republicans took aim at an ethics watchdog Could bipartisanship rise with Trump government? Schumer under pressure to add Sanders to leadership team MORE (D-Fla.) said the GOP-backed bill would “allow a fishing expedition” for data at the EPA by subjecting any number of personnel and studies to subpoenas.

Johnson compared the effort to the tobacco industry’s attempts to obtain data from the American Cancer Society in attempts to discredit the links between smoking and lung cancer.

“Thankfully, they were largely unsuccessful. And I hope today’s efforts will also fail. I want to be clear — this is not appropriate oversight. This is not an appropriate role for this committee,” she said.

— This story was updated at 3:32 p.m.