India’s trade team has extended its stay in Washington to iron out differences as the two sides look to clinch a deal before a July 9 deadline when higher US tariffs are set to kick in, people familiar with the matter said. The in-person negotiations were initially supposed to run through June 27 but were extended by a day, raising hopes of an interim trade deal. Both sides have dug in their heels over a few key issues including Washington’s demand that India open its market to genetically modified crops.