Kushner almost never speaks publicly--his chats with FORBES mark the first time he has talked about the Trump campaign or his role in it--but interviews with him and a dozen people around him and the Trump camp lead to an inescapable fact: The quiet, enigmatic young mogul delivered the presidency to the most fame-hungry, bombastic candidate in American history. "It's hard to overstate and hard to summarize Jared's role in the campaign," says billionaire Peter Thiel, the only significant Silicon Valley figure to publicly back Trump. "If Trump was the CEO, Jared was effectively the chief operating officer." "Jared Kushner...