Celebrities including Amy Schumer and Chelsea Handler have launched an Instagram campaign targeted at Ivanka Trump, urging the US President’s daughter to act on the administration’s family-separation policy and calling for the resignation of Homeland Security Secretary Kirstjen Nielsen.

As part of the campaign, well-known figures followed by Ivanka Trump on Instagram — including not just Schumer and Handler, but also American fashion entrepreneur Sophie Amoruso and British model Cara Delevingne — have been posting messages detailing the alleged abuses of children under controversial family separations at the US-Mexico border in an effort to flood her feed.

The coordinated messages begin:

“Dear Ivanka, you follow me on social media. You said family separation was a ‘low point’ for you. The low point is for the separated families. You spoke in past tense. This crisis is ongoing.”

The White House did not respond to a request for comment.