The foreign secretary refused to criticise Mr Trump for retweeting a post by right-wing commentator Katie Hopkins, which had called the capital “Khan's Londonistan”.
“President Trump has his own style and I wouldn’t use those words myself,” the Tory leadership contender told Westminster hustings.
“But the sentiment is enormous disappointment that we have a Mayor of London who has completely failed to tackle knife crime and spent more time on politics than the actual business of making Londoners safer.
“And in that, I 150 per cent agree with the president.”
“This is disgusting & it should be disqualifying for any potential PM to agree with the “sentiment” of an attack which includes the quoting of the Islamophobia of the vile Katie Hopkins,” tweeted its spokesman, Miqdaad Versi.
“Is Islamophobia so endemic in the party that the foreign secretary tolerates it so easily?”