Question: Israel Washburn Sr. (1784–1876) was a Massachusetts politician and brother of Reuel Washburn, several sons pursued politics as well, including  Cadwallader Colden Washburn (April 22, 1818May 14, 1882) was an American businessman, politician, and soldier noted for founding what would later become ?
Sentence (from "Israel Washburn"): Several went on to pursue politics as well: Israel Washburn Jr., Elihu B. Washburne, Cadwallader C. Washburn, and William D. Washburn.
Relevant evidence: Yes