What did the White House know and when did they know it? That timeline got murkier on Friday as the White House struggled to respond to mounting questions over Hillary Clinton's private email use. The heat was turned up after Politico reported that top White House officials knew back in August that Clinton was conducting official business on personal email. White House spokesman Josh Earnest, when asked about what the White House knew, said senior officials were emailing Clinton while she was secretary of state and a few noticed she wasn't using a .gov email address. However, he did not...