[365] The rapid expansion of government programs that occurred during Roosevelt's term redefined the role of the government in the United States, and Roosevelt's advocacy of government social programs was instrumental in redefining liberalism for coming generations.[366] Roosevelt firmly established the United States' leadership role on the world stage, with his role in shaping and financing World War II. His isolationist critics faded away, and even the Republicans joined in his overall policies.[367] He also created a new understanding of the presidency, permanently increasing the power of the president at the expense of Congress.[368]
His Second Bill of Rights became, according to historian Joshua Zeitz. was, "the basis of the Democratic Party's aspirations for the better part of four decades."[317] After his death, his widow, Eleanor, continued to be a forceful presence in U.S. and world politics, serving as delegate to the conference which established the United Nations and championing civil rights and liberalism generally. Some junior New Dealers played leading roles in the presidencies of Truman, John Kennedy, and Lyndon Johnson. Kennedy came from a Roosevelt-hating family. 