WASHINGTON (Reuters) - Presumptive Republican presidential nominee Donald Trump said on Tuesday his comments questioning the impartiality of a Mexican-American judge had been misconstrued as a broad attack on people of Mexican heritage.

Trump said, however, that it was fair to question the judge's impartiality in the civil suit against Trump University and whether he could receive a fair trial.

(Reporting by Eric Beech; Editing by Mohammad Zargham)