President Donald Trump expressed relief after learning of former FBI Director Robert S. Mueller III's passing, expressing his relief at the news. Mueller, who led the FBI from 2001 to 2013, served as a special counsel investigating Russian interference in the 2016 presidential election and possible ties to Trump's campaign. Despite his probe, it did not establish a criminal conspiracy between the campaign and Moscow. Former Democratic President Barack Obama praised Mueller's commitment to the rule of law and his commitment to integrity.