Former Trump Strategist Steve Bannon launches radio show and podcast on latest impeachment attempt by Democrats on President Donald Trump.

It’s been more than a year since any sort of war room has been run out of the basement of Stephen K. Bannon’s Capitol Hill townhouse. And it’s been even longer since Mr. Bannon, who was pushed out as White House chief strategist in August 2017, ran a war room for President Trump.

But everyday for the next two months — or “until the day after the acquittal of Donald J. Trump,” in Mr. Bannon’s words — a rogue, freelance messaging operation to fight impeachment is being broadcast there. The people involved in the radio show, all former Trump aides and supporters, say their intentions are clear: They want to nudge the White House, its allies and the president himself into taking a more focused and aggressive posture to undermine the inquiry currently underway in the House of Representatives.