Final answer:
Huey Long opposed FDR due to personal ambitions to seek higher office and disagreements over economic policies. Long's Share Our Wealth program was more radical than Roosevelt's New Deal, proposing extensive wealth redistribution that was untenable according to economists. Despite his popularity, Long's political career ended abruptly with his assassination.
Step-by-step explanation:
Huey Long, the charismatic and often controversial Louisiana politician, initially supported Franklin D. Roosevelt's (FDR) bid for presidency but later became one of his most vocal critics. Huey Long's opposition to FDR stemmed from both personal ambition and ideological differences. Long was a proponent of the Share Our Wealth program, which advocated for the redistribution of wealth in a manner far more radical than FDR's New Deal policies.
He criticized Roosevelt for not going far enough to help the impoverished and being a tool of bankers and corporations. Long's ambition to rise to higher office also played a role in his opposition, as he was building support to potentially challenge Roosevelt in the 1936 presidential election.
Long's tactics, which included increased taxes on corporations to fund public improvements and his willingness to take on vested interests, won him support in Louisiana. However, the economic policies he proposed were unsustainable and criticized by economists. His political career was cut short by assassination, which ultimately prevented him from becoming a contender in the 1936 election against Roosevelt.