When the American Civil Liberties Union filed law suits on behalf of families separated at the US border with Mexico, it was the latest demonstration of what its leaders have willed it to become — a rapid legal assault force against the Trump administration, writes Joel LovellON the morning of June 22, the American Civil Liberties Union won a major Supreme Court decision in Carpenter v United States, which was possibly, at least in terms of pure jurisprudence, the most important case argued before the court this past session.It was a landmark ruling that changed the future of digital privacy in America, but news of the win was only the second-most important thing happening at the ACLU offices that day.At 3pm, a conference call was scheduled to discuss the more than 2,000 children whose fates were tied to another ACLU suit against the US government.That case — Ms L v ICE — was filed in late February, long before most of the rest of the world was aaware that thousands of children were being separated from their families at the border.By comparison, a coalition of 18 state attorneys general filed a suit to stop family separation on June 26, four…