Former US secretary of state John Kerry has torn into Donald Trump for accusing him of holding "illegal" meetings with Iran, saying the American President has the maturity of an "eight-year-old boy with the insecurity of a teenage girl". Kerry's attack came in response to Trump's tweet accusing the former secretary of state of holding "illegal meetings" with the Iranian government that were "to the detriment of the American people".

"He told them to wait out the Trump Administration! Was he registered under the Foreign Agents Registration Act? BAD!" Trump tweeted. Reacting to the accusation on a late-night talk show on Friday to promote his new memoir 'Every Day is Extra', Kerry said, "He's the first President who spends more time reading his Twitter likes than his briefing books or the Constitution of the United States".