The behaviour and actions of a lot of people who occupy high positions in the human society show symptoms of mental disorders (like mental retardation).

The most powerful politicians should be evaluated whether their judgment is clouded by a mental disability.

It would be a good idea if the candidates at least underwent a thorough psychiatric examination before being appointed as presidents in control of immense nuclear arsenals.

For example American presidents are not required to pass mental health exams or psychological and psychiatric evaluations before taking office.

At the same time there are studies which suggest that as many as half of all presidents could have suffered from mental illnesses.