Trump diverted slightly from his prepared remarks in using "Islamic" rather than "Islamist."
After remaining largely on script, that diversion caught the attention of many listeners who were curious to see whether Trump would use the phrase.
Instead, Trump used words terms like "Islamic extremism, and the Islamists and
Islamic terror of all kinds."
http://thehill.com/homenews/administration/334477-senior-wh-official-trump-mixed-up-words-in-speech-because-hes