The U.S. dollar climbed against its major opponents in the European session on Monday, as concerns over a trade war escalated after Chinese state media unleashed an unusually brutal and personal attack on U.S. President Donald Trump. The overseas edition of the ruling Communist Party's People's Daily newspaper said that Trump was "starring in his own carefully orchestrated street fighter-style deceitful drama" in which diplomacy had been reduced to a "trading game in which everything should foll…