President Trump retweeted an attack on London's first Muslim mayor, Sadiq Khan, from Katie Hopkins, an English media personality known for making Islamophobic remarks.

Details: The president stepped up his Twitter attack on Khan later Saturday, calling him a "national disgrace who is destroying the City of London."

The big picture: Trump has a running feud with Khan, and he's attacked Khan on social media. But by retweeting somebody like Hopkins, he's amplifying her message of Islamophobia and giving it credibility.

  • Trump's previously tweeted in support of Hopkins as well - describing her writing about "U.K.'s Muslim problem" as "powerful."
  • The president has also tweeted: "The United Kingdom is trying hard to disguise their massive Muslim problem. Everybody is wise to what is happening, very sad! Be honest."

In 2017, Hopkins called for a "final solution" to Islamic terrorism. She was subsequently fired from her job at a radio station.

This article has been updated to include Trump's latest comments on Khan.

Go deeper: Trump retweets anti-Islam videos from far-right British politician

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