Twitter co-founder Biz Stone on Wednesday said President Trump Donald John TrumpBubba Wallace to be driver of Michael Jordan, Denny Hamlin NASCAR team Graham: GOP will confirm Trump's Supreme Court nominee before the election Southwest Airlines, unions call for six-month extension of government aid MORE will not be among the initial group of users who will test out 280-character tweets, which doubles their usual length.

"He's not in the test group," Stone tweeted in response to a question about whether Trump would get the new character limit.

He's not in the test group. — Biz Stone (@biz) September 26, 2017

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Trump, a regular user of Twitter, has had a considerable impact on the social media platform.

Just this week, Twitter had to deal with questions about why it kept a tweet up in which the president threatened North Korea. Critics argued that the tweet violated Twitter's rules against making violent threats, but the company said the tweet was of public interest in explaining why it remained up.

"Among the considerations is 'newsworthiness' and whether a Tweet is of public interest,” the company wrote. “This has long been internal policy and we'll soon update our public-facing rules to reflect it.”

At Twitter, Trump has induced disagreement between executives and board members.

Co-founder and board member Evan Williams disparagingly joked about Trump using the platform at a commencement address in May. CEO Jack Dorsey has spoken about Trump’s use of the platform more favorably.

“I believe it’s really important to hear directly from our leadership. And I believe it’s really important to hold them accountable,” Dorsey said during an NBC News segment in May.