Hillary's frequent outbursts and a willingness to violently confront her husband left Secret Service agents and White House staff on edge, writes Gary Byrne, a Clinton-era Secret Service officer, in his forthcoming book, “Crisis of Character: A White House Secret Service Officer Discloses his Firsthand Experience with Hillary, Bill, and How They Operate.” Byrne, a veteran of the military and federal law enforcement, said he was posted near the Oval Office during Bill Clinton's presidency, affording the agent a firsthand look at Hillary, who he says is too “erratic, uncontrollable and occasionally violent” to become president. “What I saw in...