US President Donald Trump has unveiled higher tariffs for Japan, South Korea and a dozen other countries in a push for new trade deals – but extended the deadline for the steeper levies to kick in until August.Trump issued similar letters to countries including Indonesia, Bangladesh, Thailand, South Africa and Malaysia, saying he would slap duties on their products ranging from 25% to 40%.These mark a step up from the 10% levy the President earlier imposed on almost all trading partners.Bu