The ObamaCare consultant who once mocked the “stupidity of the American voter” had a bigger impact on the healthcare law than previously known, The Wall Street Journal is reporting.

Jonathan Gruber frequently contacted Obama administration officials via email while crafting ObamaCare, according to the newspaper.

The Journal said that previously unreleased messages show that Gruber repeatedly messaged the White House and the Department of Health and Human Services (HHS) between January, 2009 and March, 2010.

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He offered advice on healthcare policy and informed officials about media and lawmaker interviews concerning ObamaCare, the report added.

Rep. Jason Chaffetz (R-Utah) told the newspaper that the communications disprove Gruber’s past assertions that he was a limited participant in creating the healthcare law.

The House Oversight Committee chairman added that his committee had obtained 20,000 pages emails after working with the Massachusetts Institute of Technology (MIT), where Gruber is an economist.

“His proximity to HHS and the White House was a whole lot tighter than they admitted,” Chaffetz said of Gruber’s relationship with the Obama administration, according to the Journal.

“There’s no doubt he was a much more integral part of this than they’ve said,” he added.

Chaffetz also said on Sunday he has sent HHS Secretary Sylvia Burwell a letter for additional information over Gruber’s contract with her agency.

Outrage erupted last year when video footage emerged of Gruber insulting the American electorate over ObamaCare.

He was filmed in 2013 reportedly praising “the stupidity of the American voter” for helping pass President Obama’s sweeping healthcare reform law.