The man behind Donald Trump's favourite social network has apologised for his role in helping the business mogul become US President.
In March, Mr Trump told Fox News, "Maybe I wouldn't be here if it wasn't for Twitter." He was bemoaning negative coverage in the mainstream media, saying thanks to social networking he has his "own form of media".
Evan Williams, who co-founded Twitter in 2006 with Jack Dorsey, Biz Stone and Noah Glass, says he didn't mean for it to be this way.
"It's a very bad thing, Twitter's role in that," he told the New York Times in an interview published Saturday (US time).
"If it's true that he wouldn't be President if it weren't for Twitter, then yeah, I'm sorry."
Twitter has been harshly criticised by its own users for its lack of action against racist and troll accounts, many of whom stuck with the default 'egg' picture or represented themselves with a cartoon frog called 'Pepe'.
Mr Stone told the Times they had a utopian vision of what Twitter might be, that was derailed by human nature.
"The problem is that not everyone is going to be cool, because humans are humans," he said.
"There's a lock on our office door and our homes at night. The internet was started without the expectation that we'd have to do that online."
The creator of Pepe never meant for the frog to become a hate icon, so had him killed off in a recent cartoon.
Twitter has gotten rid of the eggs, because of the bad publicity. New users now have a person.