One serves slurpees, the other definitely did not.

Republican frontrunner Donald Trump is well known for his inability to process information before spewing it out of his mouth – otherwise known as verbal vomiting, but his latest foot-in-mouth gaff may have just taken the cake.

The reality TV star turned politician seemed to confuse the 9/11 terror attacks with the 7-Eleven convenience store chain, when he spoke in Buffalo this week.

“It’s very close to my heart because I was down there,” Trump told Buffalo media.

“I watched our police and our firemen down at 7-Eleven, down at the World Trade Center right after it came down, and I saw the greatest people I’ve ever seen in action.”

Trump spokeswoman Katrina Pierson later put the verbal mash-up down to campaign fatigue in an interview with CNN.

“After you’ve done several events over a short time period, people misspeak all of the time; slip of the tongue,” Pierson explained.

However, campaign weariness or not, the blunder could prove extremely awkward for Trump, who’s made 9/11 central to his campaign across New York, holding up the city’s response to September 11, 2001 terror attacks as a defining “New York value”.

The presidential candidate also paid his first visit to the National September 11 Memorial Museum earlier this month.

Despite the obvious error, Trump continued his speech without hesitation, going on to remind his supporters that “no New Yorker” should vote for his political rival, Ted Cruz, who he expressed he felt didn’t have the state’s best interests at heart.

This is not the first time Trump has had a face palm moment in the election race. In November the Republican frontrunner appeared to physically mock a New York Times journalist who suffers from the congenital joint condition arthrogryposis, contorting his arms and flapping his hand in a comical fashion as he spoke, causing backlash from disability advocacy groups.

Trump later told media the gesticulation had been misinterpreted.

“I have no idea who this reporter, Serge Kovaleski is, what he looks like or his level of intelligence. I don’t know if he is J.J. Watt or Muhammad Ali in his prime — or somebody of less athletic or physical ability,” the The Apprentice star said in a statement to NBC News.

“If Mr. Kovaleski [the New York Times journalist] is handicapped, I would not know because I do not know what he looks like.”

Prior to his speech in Buffalo this week, Trump was widely predicted to win comfortably in New York. Only time will tell if his supporters are as forgiving of his gaff as his team.

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