Watch: Marco Rubio bursts into laughter after NATO chief calls Trump 'daddy'

Secretary of State Marco Rubio could not withhold his laughter after a reporter noted that NATO Secretary-General Mark Rutte referred to President Donald Trump as "daddy."

"The NATO chief, who is your friend," a reporter told Trump during a press conference on Wednesday. "He called you daddy earlier. Do you regard your NATO allies as kind of children?"

As the reporter spoke, Rubio was unable to hold back laughter.

"No, he likes me. I think he likes me," Trump replied. "If he doesn't, I'll let you know. I'll come back and I'll hit him hard, okay?"

"He did. He did it very affectionate," the president added. "Daddy, you're my daddy."

Watch the video below from CNN or click the link.