DONALD Trump has been accused of "spreading hate" after he retweeted unverified anti-Muslim videos from a fringe far-right UK political leader.

In a particularly outrageous morning on Twitter, the US President also implied that one of his fiercest critics, cable news host Joe Scarborough, may have been involved in the death of a co-worker.

The President retweeted three anti-Muslim videos from the account of Britain First deputy leader Jayda Fransen early Wednesday to his nearly 44 million followers.

Britain First is a UK-based far-right ultranationalist political party that is vehemently anti-immigration. Its campaigns include to ban the BBC from "discriminating against white Britons", to stop the expansion of mosques and to prevent the "persecution" of leaders Paul Golding and Jayda Fransen. Ms Fransen was convicted last year of religiously aggravated harassment after abusing a woman wearing a hijab.

White House spokeswoman Sarah Huckabee Sanders defended the President, saying it didn't matter if the videos were real or not.

"I think you're focusing on the wrong thing. The threat is real and that's what the President is talking about, is the need for national security, the need for military spending and those are very real things; there's nothing fake about that," she told reporters on Wednesday.

The second retweeted video, which is reportedly at least four years old, shows a man in Muslim dress holding a statue of the Virgin Mary and contains the caption "Muslim Destroys a Statue of Virgin Mary!"

The third video is labelled "Islamist mob pushes teenage boy off roof and beats him to death!" It reveals a group of young men on a rooftop in an undisclosed location, one of whom is wearing an Islamic State flag.

Soon after his anti-Muslim push, Mr Trump was back on Twitter weighing into the scandal surrounding Matt Lauer. The US Today show host was sacked Wednesday morning over "sexual misconduct" allegations.

Mr Trump quickly turned the discussion to Today's network, NBC, saying its executives should also be fired for "putting out so much fake news".

He went on to make an extraordinary implication about one of his fiercest critics, MSNBC's Morning Joe host Joe Scarborough.

The "unsolved mystery" Mr Trump is referring to is the death of Lori Klausutis, 28, an intern who was found dead in Scarborough's Florida office in 2001 when he was still a Republican congressman.

To be clear, there is no mystery in her death.

The medical examiner concluded that Ms Klausutis "lost consciousness because of an abnormal heart rhythm and fell, hitting her head on a desk".

"The head injury caused the death," he said a month after she was found.

There is no evidence of foul play, but the tragedy has been spun into a conspiracy theory, which has now been repeated by the President of the United States.

Mr Trump's comment was swiftly condemned.

Mr Trump's also retweeted Ms Huckabee Sanders on Wednesday morning, who said "Christmas comes early! Finally, good news from @CNN" in response to news that CNN staff would boycott the White House Christmas party.

The President has also vowed to end the "war on Christmas" after the Obamas favoured a more non-denominational approach.

This year, Trump's first presidential Christmas Card will say "Merry Christmas and a Happy New Year" rather than the generic "happy holidays" that is common in the US

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