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States House of Representatives]] but was elected to that body for one term from 1843 to 1845.. He was the Orleans Parish district attorney from 1829 to 1833. He was an envoy extraordinary and minister plenipotentiary to [[Mexico]] from 1845 to 1846. He was similarly an envoy to [[Guatemala]], [[Nicaragua]], [[El Salvador]], and [[Honduras]]. He was a member of the [[United States Senate]] from 1853 to 186 but resigned as did all southern senators except [[Andrew Johnson]] with the advent of the [[American Civil War]]. <ref name=lahist/>

States House of Representatives]] but was elected to that body for one term from 1843 to 1845.. He was the Orleans Parish district attorney from 1829 to 1833. He was an envoy extraordinary and minister plenipotentiary to [[Mexico]] from 1845 to 1846. He was similarly an envoy to [[Guatemala]], [[Nicaragua]], [[El Salvador]], and [[Honduras]]. He was a member of the [[United States Senate]] from 1853 to 186 but resigned as did all southern senators except [[Andrew Johnson]] with the advent of the [[American Civil War]]. <ref name=lahist/>

He was a [[Confederate States of America|Confederate]] diplomatic agent to [[France]] from 1861 to 1865.

He was a [[Confederate States of America|Confederate]] diplomatic agent to [[France]] from 1861 to 1865. In an international incident in 1861, Slidell and fellow diplomat James M. Mason of [[Virginia]] were seized by the British from the U.S. Navy war vessel, the ''Trent.''was a key political figure in Louisiana during the 1850s and the administration of [[U.S. President]] [[James Buchanan]]. After the Civil War, he resided in [[Paris]], [[France]],<ref name=lahist/> as had another high-ranking Confederate [[Judah P. Benjamin]], who served in the U.S. Senate alongside Slidell.  

In an international incident in 1861, Slidell and fellow diplomat James M. Mason of [[Virginia]] were seized by the British from the [[United States Navy]] war vessel, the ''Trent" in an international incident in 1861. He was a key political figure in Louisiana during the 1850s and the administration of [[U.S. President]] [[James Buchanan]]. After the Civil War, he resided in [[Paris]], [[France]],<ref name=lahist/> as had another high-ranking Confederate [[Judah P. Benjamin]]. France.  

Slidell, a city (2010 population: 27,000) in St. Tammany Parish in [[suburb]]an New Orleans, is named in his honor. He died at the age of seventy-eight at Cowes on the Isle of Wight, in [[England]] and is interred at the Saint-Roman family private cemetery near Paris.<ref name=lahist/><ref>'''A Dictionary of Louisiana Biography'' uses these sources for its article on Slidell:  ''National Cyclopedia of American Biography,'' II; Clayton Rand, ''Stars in Their Eyes'' (1953); ''The Biographical Directory of the American Congress, 1774-1971'' (1971);  “John Slidell: Louisiana Politician” (Master of Arts thesis, at [[Tuane University]] in 1948); A. L. Diket, ''ohn Slidell and the Community He Represented in the Senate, 1853-1861'' (Ph. D. dissertation at  Louisiana State University, (1958), and Louis M. Sears, ''John Slidell'' (1925).</ref>

Slidell, a city (2010 population: 27,000) in St. Tammany Parish in [[suburb]]an New Orleans, is named in his honor. He died at the age of seventy-eight at Cowes on the Isle of Wight, in [[England]] and is interred at the Saint-Roman family private cemetery near Paris.<ref name=lahist/><ref>'''A Dictionary of Louisiana Biography'' uses these sources for its article on Slidell:  ''National Cyclopedia of American Biography,'' II; Clayton Rand, ''Stars in Their Eyes'' (1953); ''The Biographical Directory of the American Congress, 1774-1971'' (1971);  “John Slidell: Louisiana Politician” (Master of Arts thesis, at [[Tuane University]] in 1948); A. L. Diket, ''ohn Slidell and the Community He Represented in the Senate, 1853-1861'' (Ph. D. dissertation at  Louisiana State University, (1958), and Louis M. Sears, ''John Slidell'' (1925).</ref>