Ex-Trump aide wants judge to decide on impeachment testimony

WASHINGTON -- An ex-White House adviser who's supposed to testify before House impeachment investigators on Monday has asked a federal court whether he should comply with a subpoena or follow U.S. President Donald Trump's directive against co-operating in what he dubs a "scam." After getting a subpoena Friday, former deputy national security adviser Charles Kupperman quickly filed a lawsuit in U.S. district court in Washington. He asked a judge to decide whether he should accede to House demands