President Donald Trump

And now the mogul turned commander-in-chief has attracted one more, after seven people sued him for blocking them on Twitter.

Mr Trump is an avid user of the social media forum, which he deploys to praise allies and lambast critics.

The lawsuit was filed by the Knight First Amendment Institute, a free speech group at Columbia University.

The seven Twitter users involved claim their accounts were blocked by the president, or his aides, after they replied to his tweets with mocking or critical comments.

Now the deputy White House press secretary has drawn comparisons with her boss by tweeting a seemingly random string of emojis.

Sarah Huckabee Sanders sought to laugh the accident off, claiming her three-year-old son had stolen her phone.

Reactions on Twitter ranged from confusion to unbridled joy.

"This is the most coherent statement to come from the Trump administration," opined journalist David Blaustein.

"Is 'lolaklkk" the next 'covfefe'?" asked tweeter Lotus Prince.

Trump said Friday that he was ready to testify under oath to special counsel Robert Mueller to deny former FBI chief James Comey's claim that the President asked him to back off his investigation into former national security adviser Michael Flynn.

"I didn't say that," Trump said of Flynn's claim. Asked at a Rose Garden news conference whether he would testify under oath to Mueller to that effect, Trump replied: "100 percent." He added, "I would be glad to tell him exactly what I just told you."

"Thank you. I won't forget what you said," Trump told Pope Francis, before leaving the Pope's private study after a half-hour private meeting.

Neither Trump nor the Pope revealed what their conversation entailed, but readouts from the White House and the Vatican highlighted terrorism, climate change and peace as agenda items covered.

There, at the Apostolic Palace, Trump met with Pope Francis -- finally.

It's a meeting millions have been waiting for, an encounter between two of the world's most intriguing and complex characters: The holy man in white who preaches good news to the poor and the brash businessman in the dark suit who embodies American extravagance.

Comey was so appalled by the request that he wanted to document it, sources said. Comey shared it with FBI senior officials, according to sources.

"I hope you can let this go," Comey wrote, quoting the President. CNN has not viewed the memo but sources described it to CNN.

The memo is the clearest sign yet of potential interference by Trump with the investigation into whether members of his campaign team colluded with Russian officials.

The information, which related to the use of laptops on aircraft, is understood to have been passed to the Americans by an ally who had apparently chosen not to share it with Moscow.

It was marked "codeword classified", and was highly sensitive.

Mr Trump has now said he "had the absolute right" to tell the Russians "acts pertaining to terrorism and airline safety".

So what are the rules around confidential information, and does he really have the right?

The White House shocked Washington by announcing that James Comey "has been terminated and removed from office".

But Democrats said he was fired because the FBI was investigating alleged links between the Trump campaign and Russia.

The move came as it emerged Mr Comey gave inaccurate information about Mrs Clinton's emails to Congress last week.

President Trump wrote in a letter to Mr Comey that he agreed with US Attorney General Jeff Sessions' recommendation that "you are not able to effectively lead the Bureau".

Mr Obama warned his successor less than 48 hours after the November election during a conversation in the Oval Office, former Obama officials said.

Mr Flynn's contacts with a Russian envoy left him vulnerable to blackmail, a Senate panel heard on Monday.

He was fired in February for concealing the nature of these contacts.

Mr Flynn, a retired army lieutenant-general, misled the Trump administration about discussing US sanctions against Russia with the country's envoy, Sergei Kislyak, before the inauguration.