president trump's closest advisers, hope hicks, will not appear before the house intelligence committee tomorrow as had been expected. so, what happened? abc senior white house correspondent cecilia vega with late developments tonight. >> reporter: in pennsylvania today, president trump had nothing but praise for his chief of staff. >> he's great. i think he's doing a great job. i think general kelly has done a really great job. he is a very special guy. >> reporter: that, after john kelly committed one of the cardinal sins of a trump confidant, by seeming to undercut his boss's signature campaign promise. >> on day one, we will begin working on an impenetrable, physical, tall, powerful, beautiful southern border wall. this is a real wall. this is a wall that's a heck of a lot higher than the ceiling you're looking at. >> reporter: but behind closed doors in a meeting with congressional hispanic caucus members, sources tell abc news kelly said the president wasn't