Fox News host Tucker Carlson can congratulate himself for the sentiment coming from the White House. Last week, Carlson apparently decided that the discussion on immigration featured an insufficient amount of racism and hate. So he attacked Omar, who arrived in the United States at the age of 12, for having the temerity to point out that this country doesn't always live up to its own lofty ideals. Folks who go into the news business dream of leaving a mark . . . As for Carlson, he's making his mark by inspiring racist tweets.