WASHINGTON (AP) — For much of the last 20 years, John Bolton was a conservative poster child, a Republican hawk whose worldview helped shape the GOP establishment’s approach to dicey foreign policy questions. Now, as President Donald Trump's former national security adviser prepares to dish on his days in the White House, some old friends and colleagues are turning on him — and others are nervously wondering what he may be poised to reveal. Leaked passages from the manuscript of Bolton's soon-to-be published book are roiling Washington, including the revelation that he says Trump told him he was conditioning the release of military aid to Ukraine on whether its government would help investigate former Vice President Joe Biden and his son. Bolton's roughly 17-month tenure in as national security adviser brought him rare access to the inner workings of the West Wing and the Cabinet, particularly on matters of global affairs.