Following the self-described "free speech" rally and counterprotest in Boston over the weekend, US President Donald Trump took to Twitter to call on American citizens to come together . Attempting to post a message of solidarity, Trump mistakenly wrote that the country needs protest in order to "heel" - twice.

"Our great country has been divided for decade, but it will come together again. Sometimes protest is needed in order to heel, and heel we will," the first tweet read before it was quickly deleted.

About 30 minutes later, Trump tried to post the message again and changed "for decade" to "for decades", but once again misspelled the word.

After taking down the second message, Trump finally posted: "Our great country has been divided for decades. Sometimes you need protest in order to heal, & we will heal, & be stronger than ever before!"

Although the posts were quickly removed, eagle-eyed Twitter users immediately spotted the error, captured screenshots of the latest embarrassing spelling gaffe and mercilessly mocked him for it.

"If you don't know the difference between #heel and heal, you shouldn't have the nuclear codes and you sure as heck shouldn't be POTUS," one Twitter user wrote.

Another wrote: "Our nation will heal when you learn the difference between 'heal' and 'heel.' Also, when you resign."

"We will heel once we covfefe. Amen," one person chimed.

Even the official Merriam-Webster Twitter account joined in and posted a helpful tweet featuring different definitions of words that sound like "heal." The post has since been retweeted over 22,000 times.

This isn't the first time Trump has tweeted out spelling errors, having misspelled "counsel", "lose" and the infamous word "covfefe" in the past.

"The only Nazis @realDonaldTrump hates are grammar Nazis," Trivium's bassist Paolo Gregoletto tweeted.

One Twitter user wrote: "Spelling is Trump's Achilles heal."

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US President Donald Trump's latest spelling gaffe had the internet in splits over the weekend Tom Pennington/Getty Images