The father of a Muslim U.S. soldier killed in combat in Iraq said in an interview late Saturday that Republican presidential nominee Donald Trump Donald John TrumpREAD: Cohen testimony alleges Trump knew Stone talked with WikiLeaks about DNC emails Trump urges North Korea to denuclearize ahead of summit Venezuela's Maduro says he fears 'bad' people around Trump MORE’s comments are “typical of a person without a soul.”

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“What he said originally — that defines him. ... People are upset with him,” Khizr Khan told The Washington Post. “He realizes, and his advisers feel that [his original statement] was a stupid mistake.”

Khan told the Post that Trump is “void of empathy” and “unfit for the stewardship of this great country.”

“A person void of empathy for the people he wishes to lead cannot be trusted with that leadership,” Khan said. “To vote is a trust. And it cannot be placed in wrong hands.”

Trump sparked controversy late last week when he lashed out at Khan over his speech at the Democratic National Convention, which was critical of Trump. The billionaire doubted whether Khan prepared his remarks and questioned his wife’s silence on stage.

Following the backlash, Trump in a statement late Saturday called Humayun Khan a "hero" but continued to criticize Khizr Khan.

"Captain Humayun Khan was a hero to our country and we should honor all who have made the ultimate sacrifice to keep our country safe. The real problem here are the radical Islamic terrorists who killed him, and the efforts of these radicals to enter our country and do us further harm," Trump said.

“While I feel deeply for the loss of his son, Mr. Khan who has never met me, has no right to stand in front of millions of people and claim I have never read the Constitution, (which is false) and say many other inaccurate things. If I become President, I will make America safe again.”

Khizr Khan told the Post that Trump displayed “faked empathy” in his most recent comments.