Official Pentagon account retweets message demanding Trump's resignation - then quickly deletes it

There are worse mistakes an organisation armed with nuclear missiles can make, but Thursday's online Pentagon gaffe was plenty embarrassing.

The Department of Defense mistakenly retweeted an anti-Trump message that demanded the president's resignation.

The Pentagon quickly disavowed the retweet and explained that it was a mistake, removing it, according to the Daily Mail.

But the liberal protester who sent the tweet into cyberspace is having a field day with the disruption.

The tweet, from unidentified Twitter user @ProudResister, equated Trump with other politicians who have drawn accusations of sexual misconduct that date back to before their political careers.

Shoutout to the “Deep State” operatives in the Department of Defense 😏 pic.twitter.com/4R8EydMxet

— William LeGate 🇺🇸 (@williamlegate) November 16, 2017

"The solution is simple," it read. "Roy Moore: Step down from the race. Al Franken: Resign from congress. Donald Trump: Resign from the presidency. GOP: Stop making sexual assault a partisan issue. It's a crime as is your hypocrisy."

Chief Pentagon Spokesperson Dana White explained how an anti-Trump message made its way to the Defense Department's 5.2 million followers.

"An authorized operator of the @DeptofDefense's official Twitter site erroneously retweeted content that would not be endorsed by the Department of Defense,' she wrote in a new tweet.

"The operator caught this error and immediately deleted it."

The @ProudResister account is run by a Los Angeles, California man who identifies himself on Facebook as Ryan Knight.

Among his Facebook posts are some that identify Barack Obama as a "patriot" and Donald Trump as a "traitor."

Another claims that while "ObamaCare" and "NFL players kneeling" offend Republicans, "pedophiles" and "white hoods" do not.

Knight's Twitter profile points to a commercial apparel business that sells a $23 t-shirt reading: "All I want for Xmas is a new president."

Another offering, a $26 sweatshirt, drops nine separate f-bombs.

They include claims that President Trump wants to "f**k America" and that his spokeswoman, White House press secretary Sarah Huckabee Sanders, aims to "f**k the truth."