Fact checker Linda Qiu checks facts:

During the rally, Mr. Trump also reiterated many claims that The Times and others have previously debunked: that Representative Nancy Pelosi, Democrat of California, supported MS-13 (she never said this), that illegal border crossings had declined 40 percent (they recently increased), and that tax cuts he signed into law last year were the largest in history (they rank 12th). He also incorrectly described other countries as not “sending their best” through the diversity visa program (applicants enter of their own volition), claimed construction had begun on his border wall (it hasn’t), and said that the suspect in the Manhattan truck attack in October had sponsored two dozen family members through “chain migration” (this is implausible).

And the crowd cheered.