Donald Trump is entitled to his own opinions, not his own facts, to paraphrase Daniel Patrick Moynihan.
Trump gets a lot wrong in his comments about immigration and Mexico. There is no evidence that Mexican officials are dispatching criminals across a porous border, and immigrants don't commit more crimes, studies show.
Yet even some of the Republican presidential candidate's critics nonetheless give him credit for tapping into something real: the perils of President Obama's lax approach to immigration, generally, and enforcement along the Mexican border in particular.
"We need to secure the border," says Carly Fiorina, another presidential contender.
This, too, is misleading.
"The border is more secure than it has been in years," says Marc Rosenblum of the Migration Policy Institute, an independent research organization that collects and analyzes immigration data.
Consider:
• Net migration from Mexico is negative, many experts say; more people are returning to Mexico than are illegally crossing the border into the U.S.