WASHINGTON — Steve Bannon, a longtime ally of former President Donald Trump was convicted on Friday of contempt charges for defying a congressional subpoena from the House committee investigating the Jan. 6 insurrection at the U.S. Capitol.Bannon, 68, was convicted after a four-day trial in federal court in Washington on two counts: one for refusing to appear for a deposition and the other for refusing to provide documents in response to the committee’s subpoena. The jury of eight men and four women deliberated …