You are correct. He didn't spend a single dollar on television (or radio) advertising (http://fortune.com/2016/08/09/donald-trump-tv-ads-clinton/ http://fortune

You are correct. He didn't spend a single dollar on television (or radio) advertising (http://fortune.com/2016/08/09/donald-trump-tv-ads-clinton/ http://fortune.com/2016/08/09/donald-trump-tv-ads-clinton/). He relied on tweets, controversial statements, and third parties for all of his advertising. This was mentioned several times by at least NPR near the end of the 2016 campaign cycle, as I recall.