- Donald J. Trump (@realDonaldTrump) June 3, 2017We must stop being politically correct and get down to the business of security for our people.
"WAKE UP!" Scavino wrote to Kahn.
Several critics pointed out that Trump had taken Khan's words out of context - the mayor said on Sunday that Londoners have "no reason to be alarmed" about the increased police presence in the city in the days following the attack.
On Saturday night, following the attack, Mr Trump tweeted a message of support to the United Kingdom, but also sparked controversy after he called for his travel ban on visitors from six predominantly Muslim countries to be upheld by U.S. courts.
Khan, who belongs to the opposition Labour Party and is the first Muslim to be elected mayor of a major Western European city, is popular in London and his response to Saturday's killings has been widely praised as dignified.
Three jihadis first drove a van into pedestrians on London Bridge late on Saturday before running into the bustling Borough Market area where they slit peoples' throats and stabbed them indiscriminately.
In a series of early morning tweets, Trump urged the Justice Department to ask for an "expedited hearing" at the high court and seek a "much tougher version" of the order temporarily blocking entry to the US from a half-dozen majority Muslim countries. The president that said he has expressed his unwavering support to the U.S. allies in the United Kingdom. And it's gone on too long. "One of the things the police, all of us need to do is make sure we're as safe as we possibly can be", Khan said. Trump also lashed out at his own Justice Department for seeking a "watered down" version of the travel ban he signed in March instead of a broader directive that was also blocked by the courts.
Former vice president and 2000 Democratic presidential nominee Al Gore said on CNN's "State of the Union: "I don't think that a major terrorist attack like this is the time to be divisive and to criticize a mayor who's trying to organize his city's response to this attack".
Trump's initial tweet Sunday implied that safety considerations were being overridden by too-careful sensitivities over issues such as ethnicity and religion - although May responded to the attack with a call Sunday for tougher measures to fight Islamist extremism.
The president also conflated the London attack with a debate that flares up periodically in the U.S when mass shootings occur.
During the U.S. presidential campaign previous year, Mr Trump first proposed the ban on Muslims entering the United States, but suggested he could make an exception for Mr Khan, who is London's first Muslim mayor.
"We need to go on doing that in the future".