In 1960 , Rosenthal was a delegate to the Democratic National Convention , which met in Los Angeles to nominate the John F. Kennedy and Lyndon B. Johnson ticket , which easily prevailed in Louisiana . In the spring of 1973 , Rosenthal unseated Carroll E. Lanier in the Democratic primary for finance and utilities commissioner . He was one of three officials elected citywide under the former commission government , a plan permitted through the Lawrason Act of 1898 . In 1977 , the commission government was replaced under a new municipal charter with the current mayor-council arrangement . Rosenthal 's fellow commissioners were John K. Snyder , who held the title of mayor and performed the executive duties over public safety and sanitation , and Malcolm P. Hebert , who directed the departments of streets and parks , with jurisdiction over Alexandria Zoological Park . Often on the three-member council , also exercising legislative duties , Snyder and Hebert formed 2-1 majorities , with Rosenthal in the dissenting role , even though all three were Democrats . Snyder and Hebert joined in 1974 to dismiss Rosenthal 's executive assistant , Floyd W. Smith , Jr. , a former mayor of Pineville
Democratic National Convention
1960 Democratic National Convention
Arnold Jack Rosenthal