Overnight Defense: Guardsman to testify that Lafayette Square clearing was ‘unprovoked escalation’ | Democrats push for controversial Pentagon nominee to withdraw | Watchdog says Pentagon not considering climate change risks to contractors

Happy Monday and welcome to Overnight Defense. I’m Rebecca Kheel, and here’s your nightly guide to the latest developments at the Pentagon, on Capitol Hill and beyond. CLICK HERE to subscribe to the newsletter.THE TOPLINE: A National Guard officer is poised to tell a House committee that the Park Police’s action to remove protesters from Lafayette Square last month was an “unprovoked escalation.”The testimony of Maj. Adam DeMarco, who served…