Frelinghuysen was a delegate to the 1860 Republican National Convention from New Jersey and from 1861 to 1867 was Attorney General of New Jersey . He was a delegate to the Peace conference of 1861 in Washington , and in 1866 was appointed by the Governor of New Jersey , as a Republican , to fill a vacancy in the United States Senate . In the winter of 1867 , he was elected to fill the unexpired term , but a Democratic majority in the New Jersey Legislature prevented his re-election in 1869
1860 Republican National Convention
1860 Republican National Convention
Frederick Theodore Frelinghuysen