Franklin Delano Roosevelt's internment of Japanese Americans during World War II was possibly the worst thing a U.S. President has ever done to his people. It now looks like the Roosevelt administration was not only morally and factually wrong in making the decision, but plainly dishonest in defending it.
Acting Solicitor General Neal Katyal has concluded that FDR's Solicitor General "deliberately hid from the court a report from the Office of Naval Intelligence that concluded the Japanese Americans on the West Coast did not pose a military threat," as the L.A. Times paraphrases it.
More from the L.A. Times:
The [Naval Intellience] report indicated there was no evidence Japanese Americans were disloyal, were acting as spies or were signaling enemy submarines, as some at the time had suggested.
[S.G. Charles] Fahy was defending Roosevelt's Executive Order 9066, which authorized forced removals of Japanese Americans from "military areas" in 1942. The solicitor general, the U.S. government's top courtroom attorney, is viewed as the most important and trusted lawyer to appear before the Supreme Court, and Katyal said he had a "duty of absolute candor in our representations to the court."