Sadiq Khan has said his re-election as Mayor of London shows the capital has "slammed the doot shut" on Donald Trump's "brand of hard right populism".
He said the former US president "couldn't be more wrong", referring to his claim that London has "opened the door to extremism".
Giving a speech following the election results on Saturday, the mayor - who was re-elected for a historic third term - said: "Donald Trump said London has 'opened the door to extremism. He couldn't be more wrong.
"The truth is, the results of this the election has proved Londoners have slammed the door shut on his brand of hard-right populism.
Sadiq Khan has said his re-election as Mayor of London shows the capital has "slammed the doot shut" on Donald Trump's "brand of hard right populism"
PA
"Londoners have said no to racism, no to division and no to hate. And yes once again to diversity."
Khan beat Conservative candidate Susan Hall, securing a third term in the post.
The Labour incumbent received just over 1,088,000 votes, a majority of some 275,000.
In today's speech, Khan described London as "the best city in the world", adding: "London is now a world leader in the new green era, a beacon for climate action and clean air and for openness, inclusion and equality across the world.
"Indeed, the reason London shines so bright today is because our story is one written by people of all faiths, all ethnicities and all backgrounds."
Despite widespread opposition to the expanded Ultra Low Emission Zone (Ulez), Khan said he will now "go even further" in the fight against air pollution.
He said: "I am passionate that London maintains its position at the forefront of climate action and environmental stewardship globally."
The Mayor added: "We've already made significant progress in the cleaning up of our air with the introduction of the world's largest clean air zone.
"And now we'll go even further, putting air pollution filters in primary schools, protecting and enhancing our green spaces and delivering a 100 per cent zero-emission bus fleet by 2030.
"We'll also continue planting more trees and cleaning up our rivers, including the Thames behind me, in the same way we've cleaned up our air."
On Friday, Prime Minister Rishi Sunak Rishi Sunak admitted he did not vote for Hall in the London mayoral elections, instead using a postal vote for his constituency in York and North Yorkshire.
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A source told the Independent the Prime Minister used a postal vote for the contest in York and North Yorkshire.
Labour’s David Skaith won the newly created mayoralty against the Conservative Pary's Keane Duncan.