After the Wednesday attack outside British Parliament, Donald Trump Jr. responded in disbelief to a comment the mayor of London made in September about dealing with terror.
London mayor Sadiq Khan, in the article, said that terrorist attacks are "part and parcel of living in a big city."
The city's first Muslim mayor has been a critic of Trump Jr.'s father, President Donald Trump. In February, Khan said that because of Trump's travel ban, he should not get VIP treatment when he comes to Britain .
"In those circumstances we shouldn't be rolling out the red carpet," the mayor said.