Defense Secretary James Mattis James Norman MattisBiden courts veterans amid fallout from Trump military controversies Trump says he wanted to take out Syria's Assad but Mattis opposed it Gary Cohn: 'I haven't made up my mind' on vote for president in November MORE on Thursday downplayed the importance of President 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's decision to fire Secretary of State Rex Tillerson Rex Wayne TillersonGary Cohn: 'I haven't made up my mind' on vote for president in November Kushner says 'Alice in Wonderland' describes Trump presidency: Woodward book Conspicuous by their absence from the Republican Convention MORE this week, telling reporters that most of the world considers the news a "Washington, D.C., story."

In a press briefing reported by The Washington Post, Mattis said he understood reporters' concerns about how U.S. allies would react to the firing of America's top diplomat, but assured journalists that much of the world views the event as having little importance.

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“I understand why you are asking,” Mattis said. “But I’m just pointing out that in most parts of the world, this is a Washington, D.C., story. It’s not about whether the United States is still an ally to the countries I’ve been, or the countries I’ve been talking to. I’ve signed letters while I’ve been out here with the normal coordination. The job goes on.”

Mattis added that mentions of Tillerson's ouster during his recent trip abroad to Bahrain did not “even come up” except from U.S. reporters asking about the decision.

“The durability of our relations with these countries, with the United States having strong institutions, goes beyond personalities,” Mattis said.

Trump fired Tillerson on Tuesday after the secretary returned from a trip to Africa, saying he made the decision "by himself" and didn't speak with Tillerson beforehand.

“I actually got along great with Rex, but really, it was a different mindset,” Trump said from the White House.

In his own statement Tuesday, Tillerson did not thank the president but spoke of the need to ensure an "orderly" transition to his nominated replacement, CIA Director Mike Pompeo Michael (Mike) Richard PompeoUS reimposes UN sanctions on Iran amid increasing tensions Sunday shows preview: Justice Ginsburg dies, sparking partisan battle over vacancy before election Trump steps up Iran fight in final election stretch MORE.

“I received a call today from the president of the United States a little after noontime from Air Force One, and I’ve also spoken to White House chief of staff [John] Kelly to ensure we have clarity about the days ahead,” Tillerson said.

"What is most important is to ensure an orderly and smooth transition during a time that the country continues to face significant policy and national security challenges," he said.