WASHINGTON (AP) — President Donald Trump has ousted the Pentagon’s top policy official who had certified last year that Ukraine had made enough anti-corruption progress to justify releasing congressionally authorized aid. The Trump administration’s delay in releasing that aid was central to the president’s impeachment by the House on charges of abuse of power and obstruction of Congress. The Senate voted to acquit the president. But in the wake of the Senate trial, an emboldened Trump has gone after officials he has perceived as being disloyal. John Rood, the undersecretary of defense for policy, is the latest official to be purged.