Following an unsuccessful bid for U.S. Senate in 1864–65,<ref>March 16, 1865. [https://www.nytimes.com/1865/03/16/archives/the-newjersey-legislaturethe-antislavery-amendment-john-p-stockton.html The New-Jersey Legislature-The Anti-Slavery Amendment John P. Stockton Elected United States Senator.] ''The New York Times''. Archived version available [https://archive.md/hSben here]. Retrieved November 8, 2021.</ref> Frelinghuysen in 1866 was appointed by Gov. Marcus L. Ward to become the state's Class I U.S. senator,<ref name=obituary/> a decision approved by the state legislature in a special election.<ref>[https://www.ourcampaigns.com/RaceDetail.html?RaceID=354842 NJ US Senate - Special Election Race - Nov 14, 1866]. ''Our Campaigns''. Retrieved November 8, 2021.</ref> | Following an unsuccessful bid for U.S. Senate in 1864–65,<ref>March 16, 1865. [https://www.nytimes.com/1865/03/16/archives/the-newjersey-legislaturethe-antislavery-amendment-john-p-stockton.html The New-Jersey Legislature-The Anti-Slavery Amendment John P. Stockton Elected United States Senator.] ''The New York Times''. Archived version available [https://archive.md/hSben here]. Retrieved November 8, 2021.</ref> Frelinghuysen in 1866 was appointed by Gov. Marcus L. Ward to become the state's Class I U.S. senator,<ref name=obituary/> a decision approved by the state legislature in a special election.<ref>[https://www.ourcampaigns.com/RaceDetail.html?RaceID=354842 NJ US Senate - Special Election Race - Nov 14, 1866]. ''Our Campaigns''. Retrieved November 8, 2021.</ref> |