Kamala Harris had a terse reply to Trump’s plan: “No.”

Donald Trump said Thursday that vaccine conspiracy theorist Robert F. Kennedy Jr. would be in charge of “women’s health” if the former president is reelected to the White House.

The comments reflect Kennedy’s growing role in a potential administration and his rising standing in the Trump orbit after he dropped his independent bid for the presidency and endorsed his onetime competitor. But calls for a senior position have troubled health advocates, who point to Kennedy’s long history as a skeptic of widely accepted science surrounding vaccines. Those concerns grew this week after the co-chair of the team planning Trump’s potential transition said Kennedy had persuaded him in a 2.5-hour meeting that vaccines caused autisma widely debunked stance.

The Harris campaign was quick to share footage of Trump’s plans for Kennedy on Thursday, and Harris herself tweeted a short response to her opponent’s pledge: “No.”