The display of troops here is just a re-election show for the Pres. It's free advertising to him. Maneuvering troops in show is an old propaganda ploy.
I love the major memorials on the Mall. Lincoln, Jefferson, and Washington memorials will stand fine under a Democratic President in 2021 just as in the past. Although I love these grand memorials (and the war memorial with my cousin's name on it), I'd like to mention, in connection with the Emancipation, a collection of interviews of former slaves that is available to read online. I return to it again and again. https://www.loc.gov/resource/mesn.130/?sp=10