Albert, a real estate developer, donated more than $10,000 to Ready for Hillary—Clinton’s campaign in waiting—in 2013. That’s on top of the thousands of dollars both Clintons have received from the pair since the 1990s.

But it’s Albert and Claire Dwoskin’s other hobby that is under scrutiny now. The Dwoskins fund a multimillion-dollar family foundation that has publicly tied the use of vaccines to a rise in autism, and is dedicated to addressing “gaps in the knowledge about the biological and genetic risk factors for vaccine induced brain and immune dysfunction.”

In other words, they’re vaccination skeptics. And the foundation is just one in a series of anti-vaxx projects that the wealthy couple bankrolls.