A head of state MUST be calm and thoughtful under pressure and not explode like a pressure cooker with a stuck release valve. Agree/dis/why?

I'd agree, and surely no sane person would disagree? A president is supposed to set an example, people should be able to look up to him for inspiration and they should feel they can rely on him. Someone who explodes at the drop of a hat, or who behaves like a spoilt brat in a playground is unpredictable and that means they cannot be trusted.

It's unprofessional and again that's a worry, because it demonstrates a lack of understanding of the office and position they hold..which means they disrespect the country and the people...

Now to get these Chump followers to believe that.