Final answer:
The idea that was rejected by Congress from Roosevelt's agenda was reorganizing the Supreme Court.
Step-by-step explanation:
The idea that was rejected by Congress from Roosevelt's agenda was reorganizing the Supreme Court. In 1937, Roosevelt proposed a court-packing plan that would add one new justice for each one over the age of seventy, thus allowing the president to make a maximum of six new appointments. However, before Congress took action on the proposal, the Supreme Court began leaning in support of the New Deal as Chief Justice Charles Evans Hughes and Justice Owen Roberts changed their view on federalism.