Donald Trump Mixes 711 With 911 Dumbest Trump Mistake Confusing 711 With 911 br br Donald J. Trump, who has touted his advocacy for New York City after the 911 attacks, accidentally referred to the day as 711 -- or 7-Eleven, the ubiquitous convenience store. br br While speaking at a campaign rally in Buffalo, New York, Donald Trump misspoke about the terror attacks on 911, instead referring to them as "711.