Президент Куку Не знал, у французов был, оказывается, в своё время невменяемый президент (Поль Дешанель, ровно как столетие тому): был отправлен в психушку, не отбыв каденцию, но после довольно быстрого излечения избран в Сенат до конца дней своих
https://en.wikipedia.org/wiki/Paul_DeschanelDeschanel aspired to a much more active role as president than had been de rigueur under the Third Republic; but, for reasons of his own mental health, was unable to put his ideas to the test
As president, his eccentric behaviour caused some consternation; on one occasion, after a delegation of schoolgirls had presented him with a bouquet, he tossed the flowers back at them one by one. On another occasion he received the British Ambassador to France naked except for the ceremonial decorations of his office
It all culminated when, late one night, 24 May 1920, he fell out of a large window of the presidential train near Montargis after taking some sleeping pills and was found wandering in his nightshirt by a platelayer, who took him to the nearest level-crossing keeper's cottage. Soon afterwards, Deschanel walked out of a state meeting, straight into a lake, fully clothed. His resignation was offered on 21 September 1920, and he was placed in a sanatorium at Rueil-Malmaison for three months. After his release he was elected to the senate in January 1921, serving until his death.
Кажется, иных медицински документированных достоверных случаев психоэксцессов у власть предержащих не имеется