Mnuchin was dismissive of the 17-year-old Swedish climate activist at the World Economic Forum in Davos, Switzerland, and said Thunberg should go study economics in college before weighing in on US policies and how they relate to the climate crisis.

A post on Linton’s verified Instagram account, which has since been deleted, reads, “I stand with Greta on this issue. (I don’t have a degree in economics either) We need to drastically reduce our use of fossil fuels. Keep up the fight @gretathunberg.”

CNN has reached out to Linton about the deleted post and the Treasury Department for comment from Mnuchin.