Fifty years of trying to make communication work teaches that you can’t have genuine communication without having credibility. And being credible equates with being believable.
While it might be possible to lead for a limited period of time by generating chaos and uncertainty, experience clearly teaches that it is impossible to lead any cause, institution, or government for a sustained period of time without being both credible and believable.
So what establishes leader credibility? Here are some of the essential factors:
Credible leaders are not perfect, but are generally seen as honest, reliable, and extremely well informed…
They also ask for and use expert advice… collaborate every day with competent team associates… behave in a manner that earns respect in all settings… have clear goals that benefit most all constituents… and communicate clearly and concisely.
In the final analysis, history honors the leaders who endure as both credible and believable. The others are quickly exposed for who they really were…
Larry D. Lauer 
Trump obviously is carrying out government based upon disruption and chaos and upon the belief that America is is always right ! Trump is demonstrating the aweful effectsof of his dreadful disregard of traditional norm of international relationships.
Donald J. Trump is a credibility gap!