US President Donald Trump is the butt of jokes on social media as he got his English lexicon mixed up again on Saturday on his Twitter rage against former President Barack Obama, accusing him for wire-tapping his phones before the election.

Although he provided no evidence to back up the claim, one of his Tweets gave evidence of his weak English knowledge by not spelling correctly the simple word: tap. Trump spelled it as ‘tapp”. It was not the first time that the US leader would be so cavalier in his writing.

How low has President Obama gone to tapp my phones during the very sacred election process. This is Nixon/Watergate. Bad (or sick) guy!

— Donald J. Trump (@realDonaldTrump) March 4, 2017

“Terrible! Just found out that Obama had my ‘wires tapped’ in Trump Tower just before the victory. Nothing found. This is McCarthyism!,” he wrote.

“Is it legal for a sitting President to be ‘wire tapping’ a race for president prior to an election? Turned down by court earlier. A NEW LOW!” he added

It wasn’t clear what, exactly, Trump was referring to as he raged against his predecessor, whom he labeled a bad (or sick) guy!”

He also said a talented lawyer could make a “a great case” out of the situation.

Obama’s post-presidency office did not immediately respond to a request for comment from Yahoo News on Trump’s accusation, and the White House did not immediately clarify from whom Trump had “just learned” this new information.

Trump has the authority to declassify almost any classified material, and could substantiate his accusations if he wanted to.

The Saturday-morning Twitter storm was striking as Trump and Obama had largely appeared to paper over their differences — at least publicly — since the election.

Trump called Obama “a very good man” shortly after his stunning November victory.

But Trump had started to increasingly blame Obama for his misfortunes, particularly an embarrassing and politically toxic string of leaks coming out of the federal government.

Trump has been particularly irked by reports linking his campaign and transition team to Russia.

He fired his national security adviser, Michael Flynn, after it was revealed that the retired lieutenant general talked to Russia’s ambassador about Obama-era sanctions and then misled Vice President Mike Pence about them.

But Trump has stood behind Attorney General Jeff Sessions, who this week has weathered a firestorm over his own conversations with the Russian ambassador during the campaign.

During his confirmation hearing, Sessions indicated under oath that he had no contact with Russian officials.

“Just out: The same Russian Ambassador that met Jeff Sessions visited the Obama White House 22 times, and 4 times last year alone,” Trump tweeted Saturday morning.

It was not only Obama that got harangued by Trump’s tweets today.

Trump also attacked actor and former governor of California Arnold Schwarzenegger who reportedly quit the TV programme, Apprentice, the hosting of which had given Trump himself much fame.

Arnold Schwarzenegger isn’t voluntarily leaving the Apprentice, he was fired by his bad (pathetic) ratings, not by me. Sad end to great show

— Donald J. Trump (@realDonaldTrump) March 4, 2017

Trump had criticised Schwarzenegger in the past over his handling of the programme. But the actor had cheekily told him to face his job as president or trade places with him.