WASHINGTON, April 23 -- When President Donald Trump this week attacked Supreme Court Justice Ketanji Brown Jackson and top House Democrat Hakeem Jeffries, two of America's most prominent Black figures, he chose a particularly pejorative insult: "low IQ person."

Trump insults people all the time - online, in speeches, in official statements and directly to the faces of some reporters.

But the "low IQ" jab, with distinct racial overtones in the United States, is especially jarring.

Trump attacked Jackson - a double Harvard graduate and the first Black woman on the Supreme Court - on Wednesday as "that new, Low IQ person, that somehow found her way to the bench."

He has similarly assailed ethnic minority Democratic lawmakers, including J...