Final answer:
Civil Rights leaders supported President Johnson's Great Society program due to its focus on addressing poverty, racial discrimination, and social inequality.
Explanation:
Civil Rights leaders were the main supporters of President Johnson's Great Society program because the program aimed to address issues of poverty, racial discrimination, and social inequality. Through initiatives like the War on Poverty and anti-segregation measures, the Great Society programs sought to create opportunities for all Americans, particularly those who had been historically marginalized.
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