Which group formed the primary opposition to Truman’s social reforms during his presidency?

The primary opposition to Truman's social reforms during his presidency came from Conservative Republicans. This group was critical of Truman's policies, particularly his initiatives aimed at expanding the social safety net and implementing civil rights reforms. Conservative Republicans sought to limit the federal government's role in the economy and oppose what they perceived as a drift towards socialism.

Truman's proposals, which included increased government spending on health care and education, as well as civil rights legislation, faced significant pushback from Conservative Republicans who believed in a more limited government and were concerned about the financial implications of these reforms. Their resistance was often vocal in Congress, leading to significant hurdles in passing legislation that aligned with Truman's vision for a more equitable society.

The other groups mentioned did not constitute the primary opposition. Liberal Democrats generally supported Truman's initiatives, and while Progressive Independents and Socialist Organizations had their own perspectives, they were not as influential in the opposition to his reforms as Conservative Republicans. Therefore, the position taken by Conservative Republicans is clearly defined in the context of the political struggles during Truman's administration.