Trump kicked off his NABJ appearance in a combative mood. It only got worse from there.

AP Photo/Charles Rex Arbogast

• Trump used his forum at the NABJ convention to air personal grievances against VP Kamala Harris.
• The conversation was tense from the start, as Trump expressed frustration with his first questions.
• The forum roiled NABJ members, with many having voiced their opposition to Trump's appearance.

Most people expected fireworks...