Mulvaney’s bid to join impeachment lawsuit challenged

WASHINGTON (AP) — White House acting chief of staff Mick Mulvaney is facing opposition in his bid to join a lawsuit over testimony in the House impeachment inquiry.
Mulvaney on Friday asked to sign onto a lawsuit asking a court to decide whether he must comply with a congressional subpoena. The lawsuit was brought by Charles Kupperman, Trump’s former deputy national security adviser. Like Kupperman, Mulvaney has defied a subpoena from impeachment investigators.
In a court filing Mond