US President Donald Trump is a genius at making decisions - but only after the fact.

He's the real-life Rambo who would have run into a school to confront a heavily armed shooter.

("I really believe I'd run in there even if I didn't have a weapon," he said after the Parkland, Florida, school shooting.) He's the omniscient terrorism analyst who would have gotten "Osama bin Laden a lot sooner than" the Navy Seals did, and even claims that "I pointed him out in my book just BEFORE the attack on the World Trade Centre".

He's the modern-day John Muir who would have raked the forests of California to prevent forest fires.