CNN
Now playing
01:10
London mayor likens Trump to an 11-year-old
A Palestinian boy watches smoke billowing from buildings during Israeli airstrikes on the southern Gaza region of Khan Yunis, on May 11, 2021
MAHMOUD KHATAB/AFP/Getty Images
A Palestinian boy watches smoke billowing from buildings during Israeli airstrikes on the southern Gaza region of Khan Yunis, on May 11, 2021
Now playing
02:54
Israel ramps up airstrikes amid barrage of rockets from Gaza
Now playing
02:35
Rand Paul and Dr. Fauci clash over Wuhan lab theory
Cheney
CNN
Cheney
Now playing
06:16
Watch Liz Cheney speak ahead of vote tomorrow to oust her
Now playing
03:59
FDA greenlights Pfzier Covid-19 vaccine for adolescents
CNN
Now playing
02:44
See exclusive look at US troops training European forces
Mandatory Credit: Photo by JIM LO SCALZO/EPA-EFE/Shutterstock (11895253o)
An image made with a drone shows fuel tanks at a Colonial Pipeline breakout station in Woodbine, Maryland, USA, 08 May 2021. A cyberattack forced the shutdown of 5,500 miles of Colonial Pipeline's sprawling interstate system, which carries gasoline and jet fuel from Texas to New York.
Cyberattack forces shutdown of Colonial Pipeline in US, Woodbine, USA - 08 May 2021
Jim Lo Scalzo/EPA-EFE/Shutterstock
Mandatory Credit: Photo by JIM LO SCALZO/EPA-EFE/Shutterstock (11895253o) An image made with a drone shows fuel tanks at a Colonial Pipeline breakout station in Woodbine, Maryland, USA, 08 May 2021. A cyberattack forced the shutdown of 5,500 miles of Colonial Pipeline's sprawling interstate system, which carries gasoline and jet fuel from Texas to New York. Cyberattack forces shutdown of Colonial Pipeline in US, Woodbine, USA - 08 May 2021
Now playing
02:12
Pipeline shutdown could push fuel prices higher
Now playing
04:24
Caitlyn Jenner reveals whether she voted for Trump in 2020
Authorities in Hangzhou's Fuyang district posted a video of a partially-sedated juvenile leopard after it was captured on May 8, 2021, having escaped a week earlier from a safari park in the eastern Chinese city.
Fuyang District Government
Authorities in Hangzhou's Fuyang district posted a video of a partially-sedated juvenile leopard after it was captured on May 8, 2021, having escaped a week earlier from a safari park in the eastern Chinese city.
Now playing
01:54
Zoo waited a week before alerting public 3 leopards were loose
ATLANTA - APRIL 30:  A Boeing 757 with a new Delta Airlines logo sits on the tarmac following the company's emergence from bankruptcy at Hartsfield Jackson International Airport April 30,2007 in Atlanta, Georgia. The 757 sports new branding that will appear on more than 900 planes, at airports and on advertising.  (Photo by Barry Williams/Getty Images) 757
Barry Williams/Getty Images North America/Getty Images
ATLANTA - APRIL 30: A Boeing 757 with a new Delta Airlines logo sits on the tarmac following the company's emergence from bankruptcy at Hartsfield Jackson International Airport April 30,2007 in Atlanta, Georgia. The 757 sports new branding that will appear on more than 900 planes, at airports and on advertising. (Photo by Barry Williams/Getty Images) 757
Now playing
01:45
Hear cockpit audio of Delta pilots reporting bird strike
screengrab palestinian
CNN
screengrab palestinian
Now playing
05:21
Palestinians fight eviction from homes in East Jerusalem
CNN
Now playing
01:38
Lawmakers push airlines to drop flight credit restrictions
ORLANDO, FLORIDA - FEBRUARY 28:  Former President Donald Trump addresses the Conservative Political Action Conference held in the Hyatt Regency on February 28, 2021 in Orlando, Florida. Begun in 1974, CPAC brings together conservative organizations, activists, and world leaders to discuss issues important to them. (Photo by Joe Raedle/Getty Images)
Joe Raedle/Getty Images
ORLANDO, FLORIDA - FEBRUARY 28: Former President Donald Trump addresses the Conservative Political Action Conference held in the Hyatt Regency on February 28, 2021 in Orlando, Florida. Begun in 1974, CPAC brings together conservative organizations, activists, and world leaders to discuss issues important to them. (Photo by Joe Raedle/Getty Images)
Now playing
02:15
Trump issues bizarre statement about Kentucky Derby winner
KRDO
Now playing
01:26
Six killed in shooting at Colorado birthday party
Justin Bamberg nr intv 05092021
CNN
Justin Bamberg nr intv 05092021
Now playing
04:05
Hear why this lawmaker is comparing his state to North Korea
Kevin McCarthy 05092021
Fox News
Kevin McCarthy 05092021
Now playing
03:30
Watch McCarthy confirm support for Stefanik for GOP leadership post
LOUISVILLE, KENTUCKY - MAY 01: Medina Spirit #8, ridden by jockey John Velazquez, (R) crosses the finish line to win the 147th running of the Kentucky Derby ahead of Mandaloun #7, ridden by Florent Geroux, and Hot Rod Charlie #9 ridden by Flavien Prat , and Essential Quality #14, ridden by Luis Saez, at Churchill Downs on May 01, 2021 in Louisville, Kentucky. (Photo by Tim Nwachukwu/Getty Images)
Tim Nwachukwu/Getty Images
LOUISVILLE, KENTUCKY - MAY 01: Medina Spirit #8, ridden by jockey John Velazquez, (R) crosses the finish line to win the 147th running of the Kentucky Derby ahead of Mandaloun #7, ridden by Florent Geroux, and Hot Rod Charlie #9 ridden by Flavien Prat , and Essential Quality #14, ridden by Luis Saez, at Churchill Downs on May 01, 2021 in Louisville, Kentucky. (Photo by Tim Nwachukwu/Getty Images)
Now playing
02:50
Kentucky Derby winner's trainer speaks out after doping allegations
(CNN) —  

London Mayor Sadiq Khan stood up for Rep. Ilhan Omar and the rest of “The Squad” as he joined dozens of British politicians in condemning US President Donald Trump’s “blatant unashamed racism” against the four Democratic congresswomen.

Writing on Twitter on Thursday, Khan said the four women “represent hope for the future.” The Mayor, who like Omar is Muslim, added that “their home is America, but their message crosses borders.”

Khan, who has clashed with Trump on previous occasions, was also among British politicians who signed an open letter of solidarity along with almost 14,000 other signatories.

This was addressed to Omar, the Minnesota representative, and her three colleagues Rep. Rashida Tlaib of Michigan, Rep. Ayanna Pressley of Massachusetts and Rep. Alexandria Ocasio-Cortez of New York.

The letter, written by the campaign group Hope Not Hate and circulated on Thursday, said: “We are disgusted by Donald Trump’s attack on you. His blatant, unashamed racism has appalled people around the world.”

The message was also signed by opposition Labour Party leader Jeremy Corbyn and two trade union general secretaries.

“You embody the best of America. Its diversity is its strength,” the letter said, adding: “Thank you for showing the world that America can still provide leadership to be proud of, even when the White House has abdicated that role. We stand in solidarity with you.”

The support came after Trump spent significant portion of his Monday campaign rally in Greenville, North Carolina, attacking the congresswomen. As Trump made a litany of accusations against them, the crowd chanted: “Send her back!” Trump made no effort to stop the chant, pausing during his remarks as the chant grew louder.

Khan and Trump have repeatedly sparred in public, most recently during the President’s state visit to the UK in June.

The London mayor wrote it was “un-British to roll out the red carpet” for Trump since his behavior “flies in the face of the ideals America was founded on – equality, liberty and religious freedom.”

Trump reacted by calling Khan a “stone cold loser,” a remark Khan later told CNN was “the sort of behavior I would expect from an 11-year-old.”

Trump has been attacking the four congresswomen since on Sunday when he told them to “go back” to their “crime infested” countries. Three of the four were born in the US, while Omar was born in Somalia and came to the US as a refugee in 2000. She became an American citizen when she was 17, according to the New York Times.

Omar responded to the Greenville rally with a tweet on Wednesday evening, quoting poet Maya Angelou.

“You may shoot me with your words, You may cut me with your eyes, You may kill me with your hatefulness, But still, like air, I’ll rise,” she wrote.

CNN’s Betsy Klein contributed to this report.