Each state each county each city use completely different local coordinate system ( commonly see state plane zone based coordinate system).
In order to create a single dataset combined from all these local data source, a single coordinate system is needed.
Albers equal area conic is the one
Albers equal area conic is the typical projection for historical USGS maps of the lower 48
https://gis.stackexchange.com/questions/141580/which-projection-is-best-for-mapping-the-contiguous-united-states
This is official name
USA_Contiguous_Albers_Equal_Area_Conic_USGS_version
wkid:102003 is similar but not identical as wkid:102039 https://gis.stackexchange.com/questions/332131/projecting-as-usa-contiguous-albers-equal-area-conic-usgs-in-qgis
https://epsg.io/102003
sr-org projection 7480 - usa_contiguous_albers_equal_area_conic_usgs_version
https://spatialreference.org/ref/sr-org/usa_contiguous_albers_equal_area_conic_usgs_version-2/
https://epsg.io/102039
https://spatialreference.org/ref/epsg/4269/
Reference
CRS interpretation in QGIS? https://gis.stackexchange.com/questions/329123/crs-interpretation-in-qgis
USA Albers Equal Area Conic USGS version (LANDFIRE) projection not read by R? https://gis.stackexchange.com/questions/291734/usa-albers-equal-area-conic-usgs-version-landfire-projection-not-read-by-r
Projecting as USA_Contiguous_Albers_Equal_Area_Conic_USGS in QGIS? https://gis.stackexchange.com/questions/332131/projecting-as-usa-contiguous-albers-equal-area-conic-usgs-in-qgis