Once again--a pattern is developing--Trump claims, later on, that his inflammatory remarks were intended as "sarcasm."
http://www.cnn.com/2016/08/12/politics/donald-trump-obama-clinton-isis-founder-sarcasm/index.html
And, a reminder about his similar claim, in July:
"Donald Trump’s incredible new defense of his Russia-spying-on-Hillary comments: Just kidding!"
https://www.washingtonpost.com/news/the-fix/wp/2016/07/28/donald-trumps-incredible-new-defense-of-his-russia-spying-on-hillary-comments-just-kidding/