In his new book, “The Amateur: Barack Obama in the White House,” journalist Edward Klein reveals how even former friends and political allies of the president have become frustrated with his remoteness and bungling of crises. Klein, former editor of The New York Times Magazine and frequent contributor to Vanity Fair, interviewed numerous members of Obama’s inner circle. In this excerpt, he explains how even celebrity backer Oprah Winfrey was shoved aside. Shortly after the 2008 presidential election, Oprah Winfrey traveled to Washington, DC, to nail down an interview for O, The Oprah Magazine with Michelle Obama. Oprah expected the...