President Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE called for the ouster of London Mayor Sadiq Khan on Saturday after a series of stabbing and shooting attacks in the city Friday night and Saturday morning left three dead and three injured.

Trump retweeted right-wing commentator Katie Hopkins, who referred to the city as "Khan's Londonistan."

"LONDON needs a new mayor ASAP. Khan is a disaster - will only get worse!" he added.

LONDON needs a new mayor ASAP. Khan is a disaster - will only get worse! https://t.co/n7qKI3BbD2 — Donald J. Trump (@realDonaldTrump) June 15, 2019

Trump later called Khan "a national disgrace who is destroying the City of London."

He is a national disgrace who is destroying the City of London! https://t.co/l3qcUS17jh — Donald J. Trump (@realDonaldTrump) June 15, 2019

Trump has feuded publicly with Khan for years and earlier this month referred to the mayor as a "stone cold loser" just ahead of his first state visit to the United Kingdom and London.

ADVERTISEMENT

"@SadiqKhan, who by all accounts has done a terrible job as Mayor of London, has been foolishly 'nasty' to the visiting President of the United States, by far the most important ally of the United Kingdom," Trump tweeted earlier this month.

"He is a stone cold loser who should focus on crime in London, not me," he added.

Khan at the time responded, calling Trump "a poster boy for the far-right movement" and adding that the insult was the "sort of behavior I would expect from an 11-year-old."

Hopkins, a former contestant on Trump's reality TV show "The Apprentice," previously wrote for several British tabloids, including the Daily Mail and The Sun, and has been the target of criticism in the past for pushing racist "white genocide" theories about immigration in the U.K. and the U.S.

After the premiere of the hit Netflix series "Dear White People" in 2017, Hopkins tweeted and later deleted a message that read: "Dear Black People. If your lives matter why do you stab and shoot each other so much."

Updated 7:34 p.m. Rachel Frazin contributed.