U.S. Secretary of State Mike Pompeo delivers a speech at the Stavros Niarchos Foundation Cultural Center in Athens, Saturday, Oct. 5, 2019. Pompeo is in Greece on the last leg of a four-nation European tour that has been overshadowed by the impeachment inquiry in Washington. Pompeo has sought to avoid the drama back home by focusing on matters directly related to his trip. (Costas Baltas/Pool via AP)
WASHINGTON The State Department has been deeply shaken by the rapidly escalating impeachment inquiry, as revelations that President Donald Trump enlisted diplomats to dig up dirt on a political rival threaten to tarnish its reputation as a nonpartisan arm of U.S. foreign policy, former senior officials say.