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Donald Trump brushed off leaked emails from Colin Powell calling him a "national disgrace" with a tweet late Wednesday dismissing the former secretary of state's credibility.

I was never a fan of Colin Powell after his weak understanding of weapons of mass destruction in Iraq = disaster. We can do much better! — Donald J. Trump (@realDonaldTrump) September 15, 2016

The contents of the emails were first reported by Buzzfeed News. It said the messages had been obtained by the website DCLeaks.com, which a federal law official told NBC News is believed to have ties to Russian intelligence services.

In one email, the former secretary of state called Trump a "national disgrace" and "international pariah" — adding that the GOP presidential contender was "in the process of destroying himself, no need for Dems to attack him."

The self-described lifelong Republican also slammed Trump for spurring the "racist" so-called "birther" movement — the consistently debunked rumor that President Barack Obama was born in another country.

The revelations mark the latest in a string of headlines around Powell's email correspondence, which have been a talking point amid controversy around Hillary Clinton's use of a private server.

Powell expressed frustration about his name being linked to Clinton's email issues, writing in another leaked email: "I have told Hilleary's [sic] minions repeatedly that they are making a mistake trying to drag me in, yet they still try."

In a 2014 email about Clinton, the retired four-star general wrote: "I would rather not have to vote for her, although she is a friend I respect."