Kammala wannan jumla: Edgerton ya kasance wakili ne a taron da ya kafa Jam'iyyar Free Soil, a 1848. Daga nan sai ya yi aiki a matsayin lauya na Summit County, Ohio, daga 1852 zuwa 1856. Daga baya a shekara ta 1856, Edgerton ya kasance wakili ga
Babban Taron Jam'iyyar Republican na farko. A wannan shekarar, an zabi shi a matsayin alkalin shari'a, amma ya ki amincewa. An zabi Edgerton a matsayin dan Republican zuwa Majalisar Wakilan Amurka a 1858.