There are few uglier phrases in the modern conservative lexicon than "anchor baby," not least because of the literal imagery the term brings to mind of a human infant, wrapped in chains and flung overboard to secure a vessel in place. But even as a figure of speech, it's a despicable concept. It refers to the notion that undocumented immigrants exploit the quintessentially American policy of birthright citizenship, which confers the status of citizen to anyone born on U.S. territory, by sneaking across the border to give birth to their children. Republican presidential candidate Jeb Bush recently stumbled into the...