“During an interview with Tucker Carlson that aired on Tuesday night, President Trump blatantly lied about NATO, claiming the United States covers 90 percent of the costs of the alliance….

After lying to Carlson about NATO funding, Trump expressed profound confusion about the very purpose of the alliance.

‘Membership in NATO obligates the members to defend any other member who has been attacked,’ Carlson said to him. ‘Let’s say Montenegro — which joined last year — is attacked. Why should my son go to Montenegro to defend it from attack?’

Trump suggested he shouldn’t.

‘I understand what you’re saying. I’ve asked the same question,’ Trump said. ‘You know, Montenegro is a tiny country with very strong people… they might get aggressive, and congratulations, you’re in World War 3.”” (Think Progress)