Republican presidential nominee Donald Trump Donald John TrumpBiden leads Trump by 36 points nationally among Latinos: poll Trump dismisses climate change role in fires, says Newsom needs to manage forest better Jimmy Kimmel hits Trump for rallies while hosting Emmy Awards MORE on Thursday declined to say he made a mistake when he attacked the Muslim family of Army Capt. Humayun Khan, who was killed in Iraq.

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"You'll have to define what a mistake means," Trump said on CNBC when asked if he agrees that he made a mistake.

"I mean we're not going to talk about that. We're here to talk about economics and we're here to talk about finance and we're here to talk about our infrastructure."

Trump faced backlash from both Democrats and Republicans after he criticized the Khan family.

Khizr Khan, the father of Humayun Khan, spoke critically of the GOP nominee during a speech last month at the Democratic National Convention. In the speech, he asked if Trump had read the Constitution and said Trump had sacrificed nothing.

Trump shot back, criticizing Khizr Khan and questioning why his wife didn't speak at the convention as well.

Earlier this month, Trump said he didn't regret the comments he made, noting he said "nice things about the son."

"And I feel that very strongly but of course I was hit very hard from the stage," he told Washington's ABC affiliate earlier this month, "and you know it’s just one of those things, but no I don’t regret anything."

On Thursday, he said there was no reason to continue the conversation on the issue.

"It's been put to bed for a long time," he said on CNBC, "and I don't think there's any reason for you to reopen it."