In the First District, incumbent Republican Andy Harris, of Cockeysville, faces no primary opposition. Three Democrats are running to unseat him, John LaFerla, Kim Letke and Wendy Rosen. The eventual Democratic challenger will face an uphill fight, to put it politely. Letke is a resident of Harford County, which is the largest single county block of votes in the district, so she possibly could parlay this into mounting a challenge to Harris. Rosen also has the potential to mount a meaningful campaign in the fall, as she has managed to run a solid campaign in the primary, something a lot of Congressional candidates have trouble with in the state's geographically largest district.