William Tharp, a descendant of early settlers in Delaware, established himself as a prominent figure in the state's 19th-century politics. He began his career in the state senate, serving multiple terms before making a bid for governor. Tharp's tenure as governor was marked by his questioning of the Mexican–American War and his support for Delawareans who served. After retiring from public office, he continued to contribute to the state's infrastructure by facilitating the transfer of Pea Patch Island for the establishment of Fort Delaware. Tharp's legacy is characterized by his progressive stance and respect within his community.

William Tharp's political identity is marked by a distinctive blend of skepticism towards military engagements and a pragmatic approach to public infrastructure. His questioning of the Mexican-American War juxtaposed with his support for Delawareans serving in it reveals a nuanced stance on military issues. Tharp's decision to hand over Pea Patch Island for Fort Delaware shows a willingness to balance regional security with broader strategic considerations. His ideological agility and calculated policy choices suggest a deeply rooted commitment to protecting local interests while engaging with larger national frameworks.