Kamala Harris's rambling 'word salad' speeches may be a symptom of a little-known but common psychological condition called logorrhoea — also known as verbal diarrhoea. The US Vice President, who was endorsed by Joe Biden after he bowed out of the presidential race on Sunday, is known for her jumbled, sometimes incoherent speaking style.... It can be a symptom of anxiety or over-confidence, but logorrhoea can be no laughing matter — and may indicate a brain injury, autism or serious condition, although there is no indication that Ms Harris suffers from these conditions. Logorrhoea is also associated with laughing wildly...