On Thursday, Vivian Yee at the New York Times repeated the tired and unproven claim that "a large body of research has suggested that immigrants are no more likely, and often less likely, to commit serious crimes than native-born Americans." Though the article had plenty of links, there was no link to anything in that alleged "large body of research." Though the Donald Trump administration has been ordered to change the situation, the fact is that there is not yet enough data to prove or disprove Yee's breezy contention, and the limited sliver of data available about federal crimes indicates...