Sen. Tammy Duckworth, D-Ill., on Thursday announced her intention to block Senate confirmations for 1,123 senior U.S. Armed Forces promotions until Defense Secretary Mark Esper confirms he will not block the "expected and deserved" promotion of Army Lt. Col. Alexander Vindman. Vindman, an Iraq War veteran, served on the White House National Security Council and was thrust into the limelight last year when he testified about President Trump's July 2019 phone call with Ukrainian President Volodymyr Zelensky that became the heart of a Democratic-led impeachment inquiry. Vindman said he listened to the call and filed a whistleblower complaint over concerns...