Who was john o sillivan?

John O'Sullivan (November 15, 1813–March 24, 1895) was an American journalist and politician.

In 1845 he was editor of the New York Morning News when he wrote an article coining the phrase `"manifest destiny"`, which stated that the expansion of the United States into the unoccupied land of the North American continent was both justified and inevitable. The term was originally used in a positive way, but it later acquired a negative connotation as it became associated with American imperialism.

O'Sullivan was also a diplomat, serving as the U.S. minister to Portugal (1854-1858) and to Spain (1861-1865).

O'Sullivan was born in New York City to Irish immigrant parents. He graduated from Columbia College in 1831 and began working as a journalist for the New York Post. He later became editor of the New York Morning Herald and The United States Magazine and Democratic Review.

O'Sullivan was a strong supporter of the Democratic Party and served in the New York State Assembly from 1846 to 1847. He was also a delegate to the Democratic National Conventions in 1848 and 1852.

After his time in government, O'Sullivan continued to write and edit for various publications, including the New York Times. He died in New York City in 1895.