Caleb Cushing (January 17, 1800 – January 2, 1879) was an American diplomat who served as a U.S. Congressman from Massachusetts and Attorney General under President Franklin Pierce.Born in Salisbury, Massachusetts, in 1800, he was the son of John Newmarch Cushing, a wealthy shipbuilder and merchant, and of Lydia Dow, a delicate and sensitive woman from Seabrook, New Hampshire, who died when he was ten. The family moved across the Merrimack River to the prosperous shipping town of Newburyport in 1802. He entered Harvard University at the age of 13 and graduated in 1817. He was a teacher of mathematics there from 1820 to 1821, and was admitted to practice in the Massachusetts Court of Common Pleas in December, 1821. He began practicing law in Newburyport in 1824. There he attended the First Presbyterian Church. On November 23, 1824, Cushing married Caroline Elizabeth Wilde, daughter of Judge Samuel Sumner Wilde, of the Massachusetts Supreme Judicial Court. His wife died about a decade later, leaving him childless and alone. He never married again. Less