Twice as much Trump? Twitter doubles its character limit on tweets

The US president's favorite social media platform has increased the allowable character limit from 140 to 280 after research found frustration among users

Twitter has doubled the character limit on tweets to allow its users to convey more meaning or emotion - or, in the case of Donald Trump, more elaborate war threats to North Korea.

"This is a small change, but a big move for us. 140 was an arbitrary choice based on the 160-character SMS limit," said chief executive Jack Dorsey, announcing the update on Tuesday.