By Manoj Kumar and Nikunj Ohri NEW DELHI (Reuters) -Indian opposition parties criticised the government on Thursday, describing U.S. President Donald Trump's threat of a 25% tariff as a diplomatic failure for New Delhi,

India’s prime minister has made a big effort to build closer ties using his rapport with the U.S. president, but critics say he is getting little in return.

India has hardened its stance on giving duty concessions to the US on agriculture and dairy sectors -- a key demand of America in the trade talks with India.