"It's time to get back to building bridges, not walls," London Mayor Sadiq Khan tweeted.
Mayor Sadiq Khan quipped that the U.S. president was "clearly busy dealing with a hurricane out on the golf course."
Mayor Sadiq Khan criticized the president for visiting his golf course in Virginia as the Category 4 storm approached.
A wave of extremist far-right movements with chilling echoes of the Nazis is being "fueled" by Donald Trump, writes Sadiq Khan on 80th anniversary of World War II.
Trump retweeted two posts from Katie Hopkins on Saturday morning. She has also previously called for a "final solution" for Muslims.
It's the latest jab in an ongoing war of words between Khan and the president.
On Monday, Trump called Khan a "terrible" mayor and "a stone cold loser."
It's payback to the man-who-doesn't-read for his nasty comments about Meghan Markle and London Mayor Sadiq Khan, says "Daily Show" host.
The U.S. president kicked off his state visit to the UK by tweeting insults comparing the London mayor to New York Mayor Bill de Blasio.
Ahead of Trump's state visit to the U.K., Khan said it's "un-British to be rolling out the red carpet" for the U.S. leader.