At the time Bannon addressed the Human Dignity Institute, Cardinal Burke was not only a member, but the president of the advisory board. Did Cardinal Burke personally pick up the phone and call Bannon to invite him? Maybe -- I certainly don't know that.  If that's a nit you want to pick, have at it.
http://www.thedailybeast.com/articles/2016/11/20/the-american-who-would-impeach-pope-francis-if-only-he-could.html