Billionaire Gautam Adani’s efforts to get US fraud charges against him resolved have stalled, according to people familiar with the matter, prolonging the regulatory overhang that has hobbled the Adani Group’s global expansion plans.Progress Adani’s representatives had been making with American officials has faltered in recent months as the US and India have clashed on issues like trade, Russian oil and India’s conflict with Pakistan, said the people, who asked not to be identified as the talks are private. ...