The honeymoon is over for Trump, whose every unwitting misstep brings chaos and strife

If Robert K Merton, the founding father of American sociology, were alive today, he'd be fascinated by the Donald Trump phenomenon. Scarcely more than 50 days into his second presidential term, hapless Trump provides daily proofs of Merton's universal "law of unintended consequences". Rooted in ignorance, error, wilful blindness and self-defeating prediction, Trump's rash actions produce contradictory, harmful and often opposite results to those he says he wants. The ensuing chaos characterises what may become the briefest honeymoon in White House history. Boomeranging US tariffs - which are to American prosperity what the Titanic was to ocean travel - are…