Gruber, a professor of economics at the Massachusetts Institute of Technology, played an important role in crafting the Massachusetts health care law signed by Romney. He would go on to help develop the Affordable Care Act.

Gruber was widely criticized last year after videos of him were uncovered saying that Obamacare’s passage depended on “the stupidity of the American voter.”

Videos, op-eds, and press releases show a close connection between Romney and Gruber.