According to the Guardian, McCain was "visibly irked" when asked about comments Trump made last week in the wake of the terrorist attack in London, in which he criticizedLondon Mayor Sadiq Khan for his response to the atrocity.
"What do you think the message is? The message is that America doesn't want to lead," McCain said. "They are not sure of American leadership, whether it be in Siberia or whether it be in Antarctica."
Then, when asked if America's international standing was better under Obama, McCain reportedly responded: "As far as American leadership is concerned, yes."