At about 21:38 in the episode we see an office building. In the next scene we see Abe Leonard working at his desk. The implication is course he is working in this building. While the building pictured is actually press related, it is about 6.700km from Capitol Hill. It is the building of the: "Bundespressekonferenz" (German Federal Press Conference) in Berlin (Germany), as indicated by the yellow public transport, the yellow letter box, license tags, street signs and last but not least the large Sign: "Bundespressekonferenz" on the right side of building.
Abe Leonard's anonymous source asks to meet at the Roosevelt Island Pedestrian Bridge, but when Abe goes to the meet he is shown waiting at the U.S. Marine Corps War Memorial (Iwo Jima Memorial) parking lot.
The fictional town of Driggs, North Dakota is mentioned to be near Devils Lake, North Dakota. There are mountains in the background. Eastern North Dakota is very flat - the nearest "mountains" are several hundred miles west of this area.