Somebody shorter did need to stand on the left side of the group to balance it with the short guy on the right side. Trump was just too tall and the photo looks more balanced with the move. But why him is the question. Did he really think to himself, wait a minute, I got to stand next to Trump, or did the photographer ask for a shorter male from the crowded center to move to the left side.I guess you have to have been there to reqlly know yhe answer.