Based on media publishing an article with the headline: "All 10 Living Former SecDefs: Keep the Military Out of Election Dispute" And this letter, which seems to be from DC mayor Muriel Bowser, it looks like the swamp could be planning to mobilise some of their threat elements such as Antifa and/or BLM to DC. To use them as a proxy to incite civil unrest so that they can order the national guard to arrest patriots.
As with other variations of this strategy, their goal is to drive the people and the security elements against one another.