Washington: US President Donald Trump has said that ‘Buy American and Hire American’ is his new mantra as he vowed to ‘very strongly’ enforce trade rules and stop “foreign cheating”. “We are going to very strongly enforce our trade rules and stop foreign cheating. Tremendous cheating. Tremendous cheating. We want products made by our workers, in our factories, stamped with those four magnificent words: Made in the US,” Trump said in his remarks at the unveiling of the Boeing 787 Dreamliner Aircraft.