Former first ladies joins Melania Trump in an unusual united political front

All four former first ladies have joined the current one, Melania Trump, in an unusual united political front expressing horror at children separated from their parents at the U.S‑Mexico border.

Melania Trump did not go as far as some of her predecessors, though and criticise the Trump administration's "zero tolerance" policy that has led to the separations.

But Michelle Obama took to Twitter, in support of Laura Bush, to say, "Sometimes truth transcends party."

Hillary Clinton, Michelle Obama, Melania Trump, Rosalynn Carter and Laura Bush, have independently expressed their concern about migrant children being torn from parents at the Mexico border.

Their outrage and call for reforms come after nearly 2,000 minors were separated from adults in the six weeks following Attorney General Jeff Sessions' announcement of the zero‑tolerance approach to illegal border crossings.