Answer: President Franklin D. Roosevelt's group of advisors were collectively known as the "Brain Trust." The Brain Trust was a group of academics, lawyers, and other experts who advised Roosevelt on economic, social, and political issues during his presidency. They played a key role in shaping many of Roosevelt's policies and initiatives, including the New Deal. Some notable members of the Brain Trust included Rexford Tugwell, Adolph Berle, Raymond Moley, and Harold L. Ickes.