US President Donald Trump’s hands, notably small in size, have often hogged the limelight in his meetings with foreign dignitaries. First, there was the 19-second scrimmage with Shinzo Abe during which Trump kept vigorously tugging the Japanese premier’s unsuspecting extremity, causing him evident discomfort. Then came the joust with Justin Trudeau, which the Can­adian leader had reportedly come prepared for, yet barely managed to survive. The president’s incorrigible limbs were even more conspicuous in their refusal to cooperate during the tete-a-tete with Angela Merkel: despite prodding, Trump did not shake the German chancellor’s hands.