“In one of his most personal attacks against an apolitical figure since becoming the presumptive Republican presidential nominee, Donald Trump delivered an extended tirade about the federal judge overseeing the civil litigation against his defunct education program,” the Wall Street Journal reports.

“Mr. Trump’s attack on U.S. District Judge Gonzalo Curiel was extraordinary not just in its scope and intensity but for its location: Before a crowd packed into a convention center here that had been primed for the New York billionaire with a warm-up speech from former Alaska Gov. Sarah Palin.”

After the audience chanted the Republican standard-bearer’s signature ‘build that wall’ mantra, Trump told them that Judge Curiel is “Mexican.”