In the weeks since the Trump administration instituted a zero tolerance policy that seeks to criminally prosecute anyone who crosses the border unlawfully and effectively causes children to be separated from their families, criticism has poured in from advocacy groups, lawmakers on both sides of the aisle and a host of political luminaries who are no longer in office.

Now, in the span of about 24 hours, all four living former first ladies have added their voices to the chorus of public critique, calling the practice “immoral,” “disgraceful” and a “humanitarian crisis.”

Even the current first lady, Melania Trump, took the somewhat unusual step of issuing a statement that appeared to align somewhat with her predecessors, while also avoiding assigning partisan blame.

“Mrs. Trump hates to see children separated from their families and hopes both sides of the aisle can finally come together to achieve successful immigration reform,” her office said in a statement on Sunday. “She believes we need to be a country that follows all laws, but also a country that governs with heart.”