Quoted in Is Trump backing away form Steve Bannon? (USA Today, 4/11/2017)
Did he or didn’t he? Trump contradicts himself on whether he knew Steve Bannon. (Politifact, 4/12/2017)
Trump's claim earn him another "Pants on Fire" ruling. The Washington Post counted nine times that Trump appeared as a guest on Bannon's radio show.
That version of events is corroborated by The New Yorker. "In 2011, David Bossie, the head of the conservative group Citizens United, introduced Trump to Bannon; at the time, Trump was thinking about running against Obama. Bannon and Trump met at Trump Tower and discussed a possible campaign. Trump decided against the idea, but the two kept in touch, and Bannon gave Trump admiring coverage. Bannon noticed that, when Trump spoke to crowds, people were electrified. Bannon began to think that Trump might be "the one" who could shake up American politics."