WASHINGTON (AP) — Senate Democratic Leader Chuck Schumer is asking the Army secretary for a briefing on what he’s doing to protect Alexander Vindman, a lieutenant colonel detailed to the White House who testified Tuesday in Democrats’ impeachment inquiry. Schumer wrote Army Secretary Ryan McCarthy after Democrats in Vindman’s closed-door deposition said they pushed back on Republican attempts to reveal the identity of a whistleblower who filed a complaint about President Donald Trump’s dealings with Ukraine.