Now Playing: How to deal with a fake news story in 2017 Now Playing.

Now Playing How to fix your social media following in 2017Now Playing: ‘Saving lives’: How Trump saved the lives of people caught in the Boston Marathon bombingNow Playing.

(AP) Now Playing Donald Trump on whether he is a patriotNow Playing Donald Trumps daughter speaks out on father’s death Now Playing ‘It’s like you’re in the Twilight Zone’: Trump defends comments about his daughter Ivanka Now Playing The latest on the Boston bombing investigationNow Playing Trump’s daughter speaks on father ‘death’ Now Playing Trump defends ‘disgraceful’ comments about Ivanka Now Loading