The United States and France on Tuesday sought to smooth over a diplomatic row after Washington’s ambassador failed to turn up for a dressing down from France’s foreign minister over comments about the killing of a young far-right activist.Charles Kushner had been summoned to meet Jean-Noel Barrot on Monday in the wake of the US administration denouncing what it called “terrorism” and left-wing violence in France after the fatal beating of Quentin Deranque.For all the latest headlines, follow our Google News channel online or via the app.When he did not turn up, France blocked the ambassador -- whose son Jared is married to Donald Trump’s daughter Ivanka -- from having access to government ministers until he explained himself.But on Tuesday, both sides said a call between the pair had now taken place.A member of Barrot’s team told AFP the minister “reiterated the reasons that had led to the summons: France cannot accept any form of interference or manipulation of its national public