The White House declined to get in the middle of a spat between Donald Trump and British Prime Minister David Cameron, other than to say that the U.S.-British relationship is one that President Obama has invested heavily in during his tenure.

Downing Street and the billionaire presumptive GOP presidential nominee traded barbs over the weekend. Cameron called the presidential hopeful “stupid, divisive and wrong” over his call for a temporary ban on Muslims entering the U.S. Trump responded by predicting that he may not have a “very good relationship” with Cameron if he wins the White House.