The White House official whom Bob Woodward charged had crosssed a line by saying he would "regret" printing his version of a set of Washington negotiations was Gene Sperling, the director of the White House Economic Council, a source familiar with the exchange told BuzzFeed Wednesday. The email from Sperling to Woodward, which Woodward read to Politico Wednesday, has transfixed Washington, with Republicans and some in the press charging that it embodies a White House lording it over a cowed press corps. Woodward, Politico reported, called the top official — identified to BuzzFeed as Sperling — to tell him that...